12th Class Biology Sexual Reproduction in Flowering Plant / फूलों के पौधों में यौन प्रजनन Question Bank

done MCQs - Sexual Reproduction in Flowering Plants Total Questions - 165

• question_answer1)
  Pollen grains are shed at
  A)
  One-celled stage done clear
  B)
  2-3 celled stage done clear
  C)
  3-celled stage done clear
  D)
  4-celled stage done clear
  View Solution play_arrow

• question_answer2)
  Ubisch bodies are connected with the formation of
  A)
  Sporopollenin done clear
  B)
  Inline and pollenkitt done clear
  C)
  Exine done clear
  D)
  Pollenkitt and pollinia done clear
  View Solution play_arrow

• question_answer3)
  Study of pollen grains is
  A)
  Palynology done clear
  B)
  Palaeonotology done clear
  C)
  Palaeobotany done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer4)
  Germ pore is the area where exine is
  A)
  Thick done clear
  B)
  Thick and uniform done clear
  C)
  Uniform done clear
  D)
  Absent done clear
  View Solution play_arrow

• question_answer5)
  Cells preset mature gametophyte of angiosperms is
  A)
  One done clear
  B)
  Two done clear
  C)
  Three done clear
  D)
  Four done clear
  View Solution play_arrow

• question_answer6)
  Which one is diploid?
  A)
  Synergids done clear
  B)
  Secondary nucleus done clear
  C)
  Antipodals done clear
  D)
  Egg done clear
  View Solution play_arrow

• question_answer7)
  Male gametophyte of angiosperms is reduced to
  A)
  1 cell done clear
  B)
  2 cells done clear
  C)
  3 cells done clear
  D)
  Four cells done clear
  View Solution play_arrow

• question_answer8)
  Fore-runner or pre cursor of male gamete is
  A)
  Megasporangium done clear
  B)
  Antipodal cell done clear
  C)
  Microspore mother cell done clear
  D)
  Embryo sac done clear
  View Solution play_arrow

• question_answer9)
  Meiosis is best seen in
  A)
  Gamete done clear
  B)
  Microsporangium done clear
  C)
  Pollen grain done clear
  D)
  Anther wall done clear
  View Solution play_arrow

• question_answer10)
  Which is part of female reproductive system
  A)
  Embryo sac done clear
  B)
  Anther done clear
  C)
  Stamen done clear
  D)
  MMC done clear
  View Solution play_arrow

• question_answer11)
  An anther having four microsporocytes shall produce pollen grains
  A)
  24 done clear
  B)
  12 done clear
  C)
  8 done clear
  D)
  16 done clear
  View Solution play_arrow

• question_answer12)
  Middle layer of anther wall is formed by secondary outer parietal layer in
  A)
  Dicots done clear
  B)
  Monocots done clear
  C)
  Both [a] and [b] done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer13)

  In the diagram of three-dimensional cut section of anther given, parts labelled as 1, 2, 3 and 4 are respectively identified as:

  A)
  1 - Ovule grains; 2 - Line of dehiscence; 3 - Pollen sacs; 4 - Filament done clear
  B)
  1 - Pollen grains; 2 - Line of dehiscence; 3 - Pollen sacs; 4 - Anther done clear
  C)
  1 - Pollen grains; 2 - Line of dehiscence; 3 - Megasporangium; 4 - Filament done clear
  D)
  1 - Pollen grains; 2 - Line of dehiscence; 3 - Pollen sacs; 4 - Filament done clear
  View Solution play_arrow

• question_answer14)
  Formation of embryo sac in flowering plant is
  A)
  Megasporogenesis done clear
  B)
  Megagametogenesis done clear
  C)
  Microgametogenesis done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer15)
  A unique phenomenon observed in the embryo sac of angiosperms is
  A)
  Fusion of gametes done clear
  B)
  Double fusion done clear
  C)
  Triple fusion done clear
  D)
  Triple fusion and double fertilization done clear
  View Solution play_arrow

• question_answer16)
  In young anther, four rows of cells destined to form pollen are collectively called
  A)
  Antheridium done clear
  B)
  Archesporium done clear
  C)
  Tapetum done clear
  D)
  Zoosporangium done clear
  View Solution play_arrow

• question_answer17)
  Wheat root cells have 42 chromosomes. The number of chromosomes in a cell of pollen grain is
  A)
  14 done clear
  B)
  21 done clear
  C)
  28 done clear
  D)
  42 done clear
  View Solution play_arrow

• question_answer18)
  A component of female reproductive system in angiosperm is
  A)
  Stamen done clear
  B)
  Anther done clear
  C)
  Microspore done clear
  D)
  Embryo sac done clear
  View Solution play_arrow

• question_answer19)
  Embryo sac is also named as
  A)
  Microgametophyte done clear
  B)
  Microsporangium done clear
  C)
  Megagametophyte done clear
  D)
  Megasporangium done clear
  View Solution play_arrow

• question_answer20)
  Tapetum occurs in
  A)
  Anther wall done clear
  B)
  Ovary wall done clear
  C)
  Male gametophyte done clear
  D)
  Female gametophyte done clear
  View Solution play_arrow

• question_answer21)
  8-nucleate embryo sac in flowering plant is
  A)
  Monosporic done clear
  B)
  Bisporic done clear
  C)
  Tetrasporic done clear
  D)
  All the above done clear
  View Solution play_arrow

• question_answer22)
  A mature male gametophyte is formed from pollen mother cell by
  A)
  One meiotic division done clear
  B)
  Two meiotic division done clear
  C)
  One meiotic and two mitotic divisions done clear
  D)
  Three meiosis divisions done clear
  View Solution play_arrow

• question_answer23)
  Pollen grains are non-green due to
  A)
  Absence of plastids done clear
  B)
  Degeneration of plastids done clear
  C)
  Conversion of plastids into chromoplastid done clear
  D)
  Attraction of vectors done clear
  View Solution play_arrow

• question_answer24)
  In Capsella, embryo sac is
  A)
  Haploid done clear
  B)
  Diploid done clear
  C)
  Triploid done clear
  D)
  Polyploid done clear
  View Solution play_arrow

• question_answer25)
  In Polygonum type of embryo sac, the cells are
  A)
  Haploid done clear
  B)
  Diploid done clear
  C)
  Both [a] and [b] done clear
  D)
  Polyploid done clear
  View Solution play_arrow

• question_answer26)
  Pollenkitt in flowering plant is formed from
  A)
  Endothecium done clear
  B)
  Middle layers done clear
  C)
  Microspore mother cell done clear
  D)
  Tapetum done clear
  View Solution play_arrow

• question_answer27)

  Consider the parts labelled in 1, 2, 3, 4 and 5 respectively in the following diagram of skull and find out the correct sequences:

  A)
  1 - Tapetum; 2 - Endothecium; 3 - Middle layers; 4 - Microspore mother cells; 5 - Epidermis done clear
  B)
  1 - Endothecium; 2 - Epidermis; 3 - Middle layers; 4 - Microspore mother cells; 5 - Tapetum done clear
  C)
  1 - Epidermis: 2 - Endothecium; 3 - Tapetum; 4 - Microspore mother cells; 5 -Middle layers done clear
  D)
  1 - Epidermis: 2 - Endothecium; 3 - Middle layers; 4 - Microspore mother cells; 5 - Tapetum done clear
  View Solution play_arrow

• question_answer28)
  Egg apparatus in me embryo sac of angiosperm consists of
  A)
  Egg and antipodals done clear
  B)
  Polar nuclei done clear
  C)
  Egg and synergids done clear
  D)
  Egg done clear
  View Solution play_arrow

• question_answer29)
  During formation of pollen grains, a microspore mother cell undergoes
  A)
  One meiotic division done clear
  B)
  One mitotic division done clear
  C)
  One meiotic and one mitotic division done clear
  D)
  One meiotic and two mitotic division done clear
  View Solution play_arrow

• question_answer30)
  Number of chromosomes is 24 in nucellus. Number of chromosomes in microspore mother cell would be
  A)
  36 done clear
  B)
  30 done clear
  C)
  24 done clear
  D)
  12 done clear
  View Solution play_arrow

• question_answer31)
  Pollen culture is used for producing
  A)
  Haploid plants done clear
  B)
  Hybrids done clear
  C)
  Disease resistant plants done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer32)
  Developing pollen grains obtains its nutrition from
  A)
  Endothecium done clear
  B)
  Tapetum done clear
  C)
  Epidermis done clear
  D)
  Middle layer done clear
  View Solution play_arrow

• question_answer33)
  In flowering plants archesporium gives rise to :
  A)
  Wall of sporangium done clear
  B)
  Both wall and sporogenous cells done clear
  C)
  Tapetum and sporogenous cells done clear
  D)
  Wall and tapetum done clear
  View Solution play_arrow

• question_answer34)
  Pollen grains are able to tolerate extremes of temperature and desiccation because their exine consists of
  A)
  Cutin done clear
  B)
  Suberin done clear
  C)
  Sporopollenin done clear
  D)
  Callose done clear
  View Solution play_arrow

• question_answer35)
  Plant part having two generations, one within the other is :
  A)
  Seed done clear
  B)
  Embryo done clear
  C)
  Germinated pollen grain done clear
  D)
  Unfertilised ovule done clear
  View Solution play_arrow

• question_answer36)
  Ploidy level of oosphere in flowering plant is
  A)
  3n done clear
  B)
  2n done clear
  C)
  n done clear
  D)
  4n done clear
  View Solution play_arrow

• question_answer37)
  Largest cell of the ovule is :
  A)
  Antipodal cell done clear
  B)
  Megaspore mother cell done clear
  C)
  Central cell done clear
  D)
  Size of cells variable done clear
  View Solution play_arrow

• question_answer38)

  Match and find the correct combination:

  [a] Pollen grains

  [b] Pollen sacs

  [c] Stamens

  [d] Microsporangia

  [e] Microspores

  [f] Microsporophylls

  A)
  a - d, b - e, c - f done clear
  B)
  a - e, b - d, c - f done clear
  C)
  a - f, b - d, c - e done clear
  D)
  a - d, b -f, c - e done clear
  View Solution play_arrow

• question_answer39)
  In 80% of angiosperm families, ovule is :
  A)
  Anatropous done clear
  B)
  Orthotropous done clear
  C)
  Amphitropous done clear
  D)
  Circinotropous done clear
  View Solution play_arrow

• question_answer40)
  Tapetal cells of stamens are :
  A)
  Dipploid binucleate done clear
  B)
  Diploid uninucleate done clear
  C)
  Hexaploid tetra nucleate done clear
  D)
  Polyploid multinucleate done clear
  View Solution play_arrow

• question_answer41)
  Anthesis is a phenomenon which refers to :
  A)
  Reception of pollen by stigma done clear
  B)
  Formation of pollen done clear
  C)
  Development of anther done clear
  D)
  Opening of floral bud done clear
  View Solution play_arrow

• question_answer42)
  Larger nucleus in a pollen grain of flowering plant is :
  A)
  Tube nucleus done clear
  B)
  Sperm nucleus done clear
  C)
  Generative nucleus done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer43)
  In angiosperms central cell of embryo sac, prior to entry of pollen tube contains:
  A)
  Two haploid polar nuclei done clear
  B)
  One diploid secondary nucleus done clear
  C)
  A single haploid nucleus done clear
  D)
  One diploid and one haploid nucleus done clear
  View Solution play_arrow

• question_answer44)

  Consider the parts labelled in 1, 2, 3 and 4 respectively in the following diagram of dissected flower of Hibiscus and find out the correct sequences :

  A)
  1 - Style; 2 - Stigma; 3 - Ovary; 4 - Thalamus done clear
  B)
  1 - Stigma; 2 - Style; 3 - Thalamus; 4 - Ovary done clear
  C)
  1 - Thalamus; 2 - Style; 3 - Ovary; 4 - Stigma done clear
  D)
  1 - Stigma; 2 - Style; 3 - Ovary; 4 - Thalamus done clear
  View Solution play_arrow

• question_answer45)
  Tapetal cells are characterized by :
  A)
  Mitotic division done clear
  B)
  Meiotic division done clear
  C)
  Endomitosis done clear
  D)
  Endomitosis as well as endopolyploidy done clear
  View Solution play_arrow

• question_answer46)
  A typical angiosperm embryo sac at maturity is:
  A)
  4 nucleate - 2 celled done clear
  B)
  8 nucleate - 7 celled done clear
  C)
  4 nucleate - 4 celled done clear
  D)
  8 nucleate - 4 celled done clear
  View Solution play_arrow

• question_answer47)
  Ploidy level of synergids are:
  A)
  Haploid done clear
  B)
  Diploid done clear
  C)
  Triploid done clear
  D)
  Tetraploid done clear
  View Solution play_arrow

• question_answer48)
  Which of the following condition of angiospermic embryo sac is seen at maturity?
  A)
  7 celled, 8 nucleate done clear
  B)
  7 celled, 7 nucleate done clear
  C)
  8 celled, 8 nucleate done clear
  D)
  8 celled, 7 nucleate done clear
  View Solution play_arrow

• question_answer49)
  The egg apparatus of angiosperm comprises:
  A)
  An egg cell and two antipodals done clear
  B)
  An egg cell and two synergids done clear
  C)
  An egg cell and two polar nuclei done clear
  D)
  An egg cell and the central cell done clear
  View Solution play_arrow

• question_answer50)
  Which of the following statements about sporopollenin is false?
  A)
  Exine is nude up of sporopollenin done clear
  B)
  Sporopollenin is one of die resistant organic materials done clear
  C)
  Exine has apertures called germ pores where sporopollenin is present done clear
  D)
  Sporopollenin can withstand high temperatures and strong acids done clear
  View Solution play_arrow

• question_answer51)

  In the diagram given, parts labelled as 'A', 'B', 'C', 'D', 'E’ and 'F' are respectively identified as:

  A)
  Synergids, polar nuclei, central cell, antipodals, filiform apparatus and egg done clear
  B)
  Polar nuclei, egg, antipodals, central cell, filform apparatus and synergids done clear
  C)
  Egg, synergids, central cell, filiform apparatus, antipodals and polar nuclei done clear
  D)
  Central cell, polar nuclei, filiform apparatus, antipodals, synergids and egg done clear
  View Solution play_arrow

• question_answer52)
  Which of the following is the function of tapetum?
  A)
  Respiratory done clear
  B)
  Nutritive done clear
  C)
  Reproductive done clear
  D)
  Protective done clear
  View Solution play_arrow

• question_answer53)

  Given below is the diagram of an embryo sac. Choose the option in which all the four parts. A, B, C and D are correctly identified.

  A)
  A- synergids, B-antipodal cells, C-egg cell, D-polar nuclei done clear
  B)
  A-egg cell, B-synergids, C-polar nuclei, D-antipodal cell done clear
  C)
  A-egg cell, B-polar nuclei, C-synergids, D-antipodal cells done clear
  D)
  A-antipodal cell, B-egg cell, C-polar nuclei, D-synergids done clear
  View Solution play_arrow

• question_answer54)
  The body of ovule is fused with funicle at a point called
  A)
  integuments done clear
  B)
  hilum done clear
  C)
  micropyle done clear
  D)
  chalaza done clear
  View Solution play_arrow

• question_answer55)
  Megaspores are produced from the megaspore mother cells after
  A)
  mitotic division done clear
  B)
  formation of thick wall done clear
  C)
  Differentiation done clear
  D)
  meiotic division done clear
  View Solution play_arrow

• question_answer56)
  Which of the following statements is correct?
  A)
  Sporopollenin can be degraded by enzymes. done clear
  B)
  Sporopollenin is made up of inorganic materials. done clear
  C)
  Sporopollenin can withstand high temperatures as well as strong acids and alkalis. done clear
  D)
  Sporopollenin can withstand high temperatures but not strong acids. done clear
  View Solution play_arrow

• question_answer57)

  The diagram given below denotes the various parts of a typical flower. Identify the labelled parts A, B, C and D and choose the correct option.

  A)
  A-Petals, B-Sepals, C- Stamens, D-Pistil done clear
  B)
  A-Sepals, B-Pistil, C-Petals, D-Stamens done clear
  C)
  A-Sepals, B-Pistil, C-Stamens, D-Petals done clear
  D)
  A-Sepals, B-Petals, C-Pistil, D-Stamens done clear
  View Solution play_arrow

• question_answer58)

  Which of the following feature(s) is/are common to both wind and water pollinated flowers?

  I. Pollen grains are long and ribbon-like

  II. Stigma is large and feathery

  III. The flowers are not colorful

  IV. The flowers do not produce nectar

  A)
  III and IV only done clear
  B)
  II and III only done clear
  C)
  I and II only done clear
  D)
  II only done clear
  View Solution play_arrow

• question_answer59)
  With respect to angiosperms, identify the incorrect pair from the following
  A)
  Primary endosperm nucleus - 3n done clear
  B)
  Antipodals - 2n done clear
  C)
  Cells of nucellus of ovule - 2n done clear
  D)
  Vegetative cell of male gametophyte - n done clear
  View Solution play_arrow

• question_answer60)
  The germ pores in the pollen grain are the regions
  A)
  which are made up of lignin and suberin done clear
  B)
  that can withstand high temperature and strong acids and alkalis done clear
  C)
  which lack sporopollenin done clear
  D)
  through which sperms are released into the female gametophyte done clear
  View Solution play_arrow

• question_answer61)
  Which part of the plant contains sporogenous tissue?
  A)
  Pollen done clear
  B)
  Microspores done clear
  C)
  Young anther done clear
  D)
  Stamen done clear
  View Solution play_arrow

• question_answer62)
  The embryo sac of angiosperms contains
  A)
  3 celled egg apparatus, 3 antipodal cells and 2 polar nuclei done clear
  B)
  2 celled egg apparatus, 3 antipodal cells and 2 polar nuclei done clear
  C)
  3 celled egg apparatus, 2 antipodal cells and 1 polar nuclei done clear
  D)
  3 celled egg apparatus, 1 antipodal -cell and 2 polar nuclei done clear
  View Solution play_arrow

• question_answer63)
  The ideas of megaspore divides mitotically to form two nuclei which move to opposite poles and thus form an embryo sac which is
  A)
  8 nucleate done clear
  B)
  6 nucleate done clear
  C)
  4 nucleate done clear
  D)
  2 nucleate done clear
  View Solution play_arrow

• question_answer64)
  Developing pollen is nourished by
  A)
  tapetum done clear
  B)
  endothecium done clear
  C)
  epidermis done clear
  D)
  middle layer done clear
  View Solution play_arrow

• question_answer65)
  In angiosperms, the formation of two male gametes from a pollen grain involves ......... division
  A)
  one meiotic and one mitotic done clear
  B)
  two meiotic and two mitotic done clear
  C)
  only two mitotic done clear
  D)
  only two meiotic done clear
  View Solution play_arrow

• question_answer66)
  An immature male gametophyte differs from a mature male gametophyte in that it
  A)
  has not yet left the pollen sac done clear
  B)
  has not yet germinated and its generative cells has not divided into two male gametes done clear
  C)
  is a microspore that has not yet divided by mitosis done clear
  D)
  still consist of microsporocyte done clear
  View Solution play_arrow

• question_answer67)

  Consider the parts labelled in 1, 2, 3, 4 and 5 respectively in the following diagram of anatropous ovule and find out the correct sequences :

  A)
  1 - Funicle; 2 - Micropyle; 3 - Outer Integument; 4 - Inner integument; 5 - Embryo sac done clear
  B)
  1 - Hilum; 2 - Micropylar pole; 3 - Outer Integument; 4 - Inner integument; 5 - Embryo sac done clear
  C)
  1 - Hilum; 2 - Micropyle; 3 - Outer Integument; 4 - Inner integument; 5 - Embryo sac done clear
  D)
  1 - Hilum; 2 - Micropyle; 3 - Outer Integument; 4 - Inner integument; 5 - Nucellus done clear
  View Solution play_arrow

• question_answer68)
  The phenomenon of embryo formation from a vegetative cell derived from zygote is known as
  A)
  Apospory done clear
  B)
  Diploid polyembryony done clear
  C)
  Adventive polyembryony done clear
  D)
  Apomixis done clear
  View Solution play_arrow

• question_answer69)
  Perisperm is
  A)
  Outer part of embryo sac done clear
  B)
  Degenerate synergid done clear
  C)
  Degenerate secondary nucleus done clear
  D)
  Remains of nucellus done clear
  View Solution play_arrow

• question_answer70)
  Process of fusion between male nucleus and egg nucleus is
  A)
  Syngamy done clear
  B)
  Double fertilization done clear
  C)
  Conjugation done clear
  D)
  Triple fusion done clear
  View Solution play_arrow

• question_answer71)
  Triple fusion occurs between
  A)
  Egg and male gamete done clear
  B)
  Male gamete and secondary nucleus done clear
  C)
  Antipodal cell and male gamete done clear
  D)
  Egg and antipodal cell done clear
  View Solution play_arrow

• question_answer72)
  The gametes taking part in double fertilization are
  A)
  5 done clear
  B)
  4 done clear
  C)
  3 done clear
  D)
  2 done clear
  View Solution play_arrow

• question_answer73)
  Function of suspensor of embryo is
  A)
  Absorption of nourishment done clear
  B)
  Push the embryo into nutritive endosperm region done clear
  C)
  Formation of secondary embryos done clear
  D)
  All the above done clear
  View Solution play_arrow

• question_answer74)
  A diploid male angiospermic plant is crossed with tetraploid female plant. Endosperm in seed will be
  A)
  Haploid done clear
  B)
  Triploid done clear
  C)
  Tetraploid done clear
  D)
  Pentaploid done clear
  View Solution play_arrow

• question_answer75)
  Nawaschin (1898) discovered double fertilization in
  A)
  Lilium and Fritillaria done clear
  B)
  Brassica and Iberis done clear
  C)
  Papaya and Pea done clear
  D)
  Mangifera and Sugarcane done clear
  View Solution play_arrow

• question_answer76)
  In mesogamy, pollen tube enters the ovule through
  A)
  Middle of integuments after piercing the tissues done clear
  B)
  Middle of integuments without piercing the tissues done clear
  C)
  Chalaza done clear
  D)
  Middle of micropyle done clear
  View Solution play_arrow

• question_answer77)
  In porogamy, pollen tube enters the ovule through
  A)
  Middle of integuments after piercing the tissues done clear
  B)
  Middle of integuments without piercing the tissues done clear
  C)
  Chalaza done clear
  D)
  Middle of micropyle done clear
  View Solution play_arrow

• question_answer78)
  Pollen tube discharges its male gametes into
  A)
  Egg done clear
  B)
  Healthy synergid done clear
  C)
  Degenerating synergid done clear
  D)
  Central cell done clear
  View Solution play_arrow

• question_answer79)

  Consider the parts labelled in 1, 2, 3, 4 and 5 respectively in the following diagram of longitudinal section of flower showing growth of pollen tube and find out the correct  sequences:

  A)
  1 - Antipodal; 2 - Pollen tube; 3 - Polar nuclei; 4 - Egg cell; 5 - Synergid done clear
  B)
  1 - Pollen tube; 2 - Polar nuclei; 3 - Antipodal; 4 - Egg cell; 5 - Synergid done clear
  C)
  1 - Pollen tube; 2 - Antipodal; 3 - Polar nuclei; 4 - Egg cell; 5 - Synergid done clear
  D)
  1 - Pollen tube; 2 - Antipodal; 3 - Polar nuclei; 4 - Synergid; 5 - Egg cell done clear
  View Solution play_arrow

• question_answer80)
  Formation of an extra embryo from nucellus or integument is
  A)
  Simple polyembryony done clear
  B)
  Adventitive polyembryony done clear
  C)
  Vegetative polyembryony done clear
  D)
  Cleavage polyembryony done clear
  View Solution play_arrow

• question_answer81)
  Embryo of Sunflower has
  A)
  One cotyledons done clear
  B)
  Two cotyledons done clear
  C)
  Three cotyledons done clear
  D)
  Many cotyledons done clear
  View Solution play_arrow

• question_answer82)
  Pollen tube deposits its inclusions in
  A)
  Central cell done clear
  B)
  Synergids done clear
  C)
  Oosphere done clear
  D)
  Antipodal cells done clear
  View Solution play_arrow

• question_answer83)
  Suspensor in angiosperm is component of
  A)
  Developing embryo done clear
  B)
  Mature embryo done clear
  C)
  Endosperm done clear
  D)
  Germinated embryo done clear
  View Solution play_arrow

• question_answer84)
  A number of fruitlets (seeds) of Strawberry are removed randomly during development of
  A)
  Normal fruit with fewer seeds is formed done clear
  B)
  Distorted fruit with under-developed portions is formed done clear
  C)
  A seedless fruit is formed done clear
  D)
  Fruit stops development done clear
  View Solution play_arrow

• question_answer85)
  Which one is produced as a result of double fertilization?
  A)
  Seed done clear
  B)
  Fruit done clear
  C)
  Megaspore done clear
  D)
  Endosperm done clear
  View Solution play_arrow

• question_answer86)
  If meiosis occurs inside pollen grain and egg nuclei, it will be
  A)
  Zygotic meiosis done clear
  B)
  Gametic meiosis done clear
  C)
  Sporic meiosis done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer87)
  Multinucleate condition is present in
  A)
  Quiescent centre  done clear
  B)
  Maize done clear
  C)
  Meristematic tissue done clear
  D)
  Lipid endosperm of Coconut done clear
  View Solution play_arrow

• question_answer88)
  Entry of pollen tube through the end opposite to microphyle is
  A)
  Porogamy done clear
  B)
  Chalazogamy done clear
  C)
  Mesogamy done clear
  D)
  Syngamy done clear
  View Solution play_arrow

• question_answer89)
  Free nuclear division occurs in
  A)
  Flower done clear
  B)
  Gametes done clear
  C)
  Endosperm done clear
  D)
  Fruit done clear
  View Solution play_arrow

• question_answer90)
  Formation of embryo from vegetative cells, derived from zygote is called
  A)
  Apomixis done clear
  B)
  Adventitive polyembryony done clear
  C)
  Apospory done clear
  D)
  Diploid polyembryony done clear
  View Solution play_arrow

• question_answer91)
  Formation of an organism from a single, male gamete without fusion with egg is an example of
  A)
  Parthenogenesis done clear
  B)
  Apogamy done clear
  C)
  Apospory done clear
  D)
  Parthenocarpy done clear
  View Solution play_arrow

• question_answer92)
  Formation of embryo directly from nucellus and integument is
  A)
  Adventitive polyembryony done clear
  B)
  Apospory done clear
  C)
  Apogamy done clear
  D)
  Apomixis done clear
  View Solution play_arrow

• question_answer93)
  Anemophily occurs in
  A)
  Grasses and Maize done clear
  B)
  Legumes and Rafflesia done clear
  C)
  Euphorbia and Hydrilla done clear
  D)
  Annona and Zostera done clear
  View Solution play_arrow

• question_answer94)
  Pollination by ants is referred as
  A)
  Malacophily done clear
  B)
  Myrmecophily done clear
  C)
  Entomophily done clear
  D)
  Ornithophily done clear
  View Solution play_arrow

• question_answer95)
  Maturation of anthers and stigma at the same time is
  A)
  Allogamy done clear
  B)
  Xenogamy done clear
  C)
  Homogamy done clear
  D)
  Dichogamy done clear
  View Solution play_arrow

• question_answer96)
  Some flowers possess pleasant odour and attractive colours for
  A)
  Entomophily done clear
  B)
  Hydrophily done clear
  C)
  Anemophily done clear
  D)
  All the above done clear
  View Solution play_arrow

• question_answer97)
  Night blooming flowers are generally
  A)
  Light weight and coloured done clear
  B)
  Scented and white done clear
  C)
  Brightly coloured and odourless done clear
  D)
  Bloom in clusters and heavy weight done clear
  View Solution play_arrow

• question_answer98)
  Heterozygosity in an open flower is produced following
  A)
  Xenogamy done clear
  B)
  Geitonogamy done clear
  C)
  Autogamy done clear
  D)
  Cleistogamy done clear
  View Solution play_arrow

• question_answer99)
  Cross pollination is preferred over self-pollination because it
  A)
  Produces better offspring done clear
  B)
  Forms new varieties done clear
  C)
  Induces parthenogenesis done clear
  D)
  Is economical done clear
  View Solution play_arrow

• question_answer100)
  Pollination in Lotus is carried out by
  A)
  Wind done clear
  B)
  Water done clear
  C)
  Insects done clear
  D)
  All the above done clear
  View Solution play_arrow

• question_answer101)
  Male gamete enters the ovule through chalaza is called
  A)
  Mesogamy done clear
  B)
  Porogamy done clear
  C)
  Chalazogamy done clear
  D)
  Apogamy done clear
  View Solution play_arrow

• question_answer102)
  Intraspecific incompatibility is overcome by
  A)
  Mixed pollination done clear
  B)
  Self-pollination done clear
  C)
  Wetting of anthers done clear
  D)
  Wetting of stigmas done clear
  View Solution play_arrow

• question_answer103)
  Triple fusion involves fusion of
  A)
  Two male gametes and one egg done clear
  B)
  Two eggs and one male gamete done clear
  C)
  Two male gametes and secondary nucleus done clear
  D)
  One male gamete and two polar nuclei of central cell done clear
  View Solution play_arrow

• question_answer104)
  Flowers of anemophilous plants must have
  A)
  Sticky stigmas done clear
  B)
  Feathery stigmas done clear
  C)
  prominent nectarines done clear
  D)
  Colourful flowers done clear
  View Solution play_arrow

• question_answer105)
  Flowers remain closed in
  A)
  Dicliny done clear
  B)
  Chasmogamy done clear
  C)
  Dichogamy done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer106)
  Contrivance for self-pollination is
  A)
  Cleistogamy done clear
  B)
  Bisexuality done clear
  C)
  Homogamy done clear
  D)
  All the above done clear
  View Solution play_arrow

• question_answer107)
  Development of haploid plants from pollen is :
  A)
  Emasculation done clear
  B)
  Parthenocarpy done clear
  C)
  Androgenesis done clear
  D)
  Somatic hybridization done clear
  View Solution play_arrow

• question_answer108)
  In Zostera fertilisation takes place through
  A)
  Air done clear
  B)
  Fresh water done clear
  C)
  Sea Water done clear
  D)
  Honey bee done clear
  View Solution play_arrow

• question_answer109)
  Intraspecific incompatibility is overcome by:
  A)
  Mixed pollination done clear
  B)
  Self-pollination done clear
  C)
  wetting of fibers done clear
  D)
  Wetting of stigmas done clear
  View Solution play_arrow

• question_answer110)
  Eodosperm of flowering plants develops from :
  A)
  Haploid nucleus done clear
  B)
  Diploid nucleus done clear
  C)
  Triploid nucleus done clear
  D)
  Tetraploid nucleus done clear
  View Solution play_arrow

• question_answer111)
  Fig plant get pollinated by
  A)
  Ant done clear
  B)
  Blastophaga done clear
  C)
  Bee done clear
  D)
  Butterfly done clear
  View Solution play_arrow

• question_answer112)
  Contrivance for cross pollination is :
  A)
  Cleistogamy done clear
  B)
  Bisexuality done clear
  C)
  Homogamy done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer113)
  Function of guiding and attracting pollen tube is done by :
  A)
  Egg cell of embryo sac done clear
  B)
  Filiform apparatus of embryo sac done clear
  C)
  Antipodal cells of embryo sac done clear
  D)
  Secondary nucleus of embryo sac done clear
  View Solution play_arrow

• question_answer114)
  In angiosperms, triple fusion produces:
  A)
  Secondary nucleus done clear
  B)
  Polar nucleus done clear
  C)
  Primary endospermic nucleus done clear
  D)
  Zygotic nucleus done clear
  View Solution play_arrow

• question_answer115)
  Xenia and metaxenia are related to :
  A)
  Xylem and phloem done clear
  B)
  Only endosperm done clear
  C)
  Pollen and endosperm done clear
  D)
  Pollen culture done clear
  View Solution play_arrow

• question_answer116)
  Radicle end of embryo is towards :
  A)
  Hilum done clear
  B)
  Chalaza done clear
  C)
  Funicle done clear
  D)
  Micropyle done clear
  View Solution play_arrow

• question_answer117)
  In a monocot, endosperm cells have 24 chromosomes. What shall be the chromosome number in embryo?
  A)
  24 done clear
  B)
  16 done clear
  C)
  12 done clear
  D)
  8 done clear
  View Solution play_arrow

• question_answer118)
  Secondary nucleus present in the middle of embryo sac is :
  A)
  Tetraploid done clear
  B)
  Triploid done clear
  C)
  Diploid done clear
  D)
  Haploid done clear
  View Solution play_arrow

• question_answer119)

  Consider the parts labelled in 1, 2, 3, 4 and 5 respectively in the following diagram of a typical dicot embryo and find out the correct sequences :

  A)
  1 - Cotyledons; 2 - Plumule; 3 - Hypocotyl; 4 - Radicle; 5 - Root cap done clear
  B)
  1 - Plumule; 2 - Cotyledons; 3 - Hypocotyl; 4 - Radicle; 5 - Root cap done clear
  C)
  1 - Plumule; 2 - Cotyledons; 3 - Epicotyl; 4 - Radicle; 5 - Root cap done clear
  D)
  1 - Plumule; 2 - Cotyledons; 3 - Hypocotyl; 4 - Radicle; 5 - Coleoptile done clear
  View Solution play_arrow

• question_answer120)
  Pollination between flower of the same plant is :
  A)
  Chasmogamy done clear
  B)
  Autogamy done clear
  C)
  Geitonogamy done clear
  D)
  Cleistogamy done clear
  View Solution play_arrow

• question_answer121)
  Wind pollinated flowers are :
  A)
  Small, scented and colourless done clear
  B)
  Small, nonscented and colourless done clear
  C)
  Big, scented and coloured done clear
  D)
  Big, nonscented and colourless done clear
  View Solution play_arrow

• question_answer122)
  Aleurone layer in maize grain is specially rich in :
  A)
  Lipids done clear
  B)
  Auxins done clear
  C)
  Proteins done clear
  D)
  Starch done clear
  View Solution play_arrow

• question_answer123)
  Total number of nuclei involved in double fertilization is :
  A)
  Two done clear
  B)
  Three done clear
  C)
  Four done clear
  D)
  Five done clear
  View Solution play_arrow

• question_answer124)
  Pollen tube usually enters the embryo sac :
  A)
  Through one of the synergids or help cell done clear
  B)
  Directly penetrates the egg or oosphere done clear
  C)
  By knocking of antipodal cells done clear
  D)
  Between one synergid and central cell done clear
  View Solution play_arrow

• question_answer125)
  A diploid female plant is crossed with tetraploid male. The ploidy level of endosperm will be :
  A)
  Tetraploidy done clear
  B)
  Pentaploidy done clear
  C)
  Triploidy done clear
  D)
  Diploidy done clear
  View Solution play_arrow

• question_answer126)
  In oogamy, fertilization occurs between:
  A)
  Small nonmotile female gamete and large motile male gamete done clear
  B)
  Large nonmotile female gamete and small motile male gamete done clear
  C)
  A large nonmotile female gamete and a small nonmotile male gamete done clear
  D)
  A large motile female gamete and a small nonmotile male gamete done clear
  View Solution play_arrow

• question_answer127)
  Device for self-pollination in the members of angiosperm is:
  A)
  Heterostyly done clear
  B)
  Dicliny done clear
  C)
  Unisexuality        done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer128)
  Plants of which one of the following groups of genera are pollinated by same agency?
  A)
  Triticum, Mussanda, Zea mays done clear
  B)
  Kadam, Cannabis done clear
  C)
  Salvia, Calotropis, Rafflesia done clear
  D)
  Salvia, Pinus, Ophrys done clear
  View Solution play_arrow

• question_answer129)
  In nature, cleistogamous flowers are :
  A)
  Wind pollinated done clear
  B)
  Bird pollinated done clear
  C)
  Self-pollinated done clear
  D)
  Insect pollinated done clear
  View Solution play_arrow

• question_answer130)
  In some plants, anthers and stigma grow and mature at same time. This phenomenon is called
  A)
  Homogamy done clear
  B)
  Syngamy done clear
  C)
  Allogamy done clear
  D)
  Fusion done clear
  View Solution play_arrow

• question_answer131)
  Double fertilization or triple fusion leading to initiation of endosperm in angiosperms, requires:
  A)
  Fusion of 4 or more polar nuclei and the second male gamete only done clear
  B)
  Fusion of 2 polar nuclei and second male gamete only done clear
  C)
  Fusion of one polar nucleus and second male gamete only done clear
  D)
  All the above types of fusions in different types of angiosperms done clear
  View Solution play_arrow

• question_answer132)
  Anemophily type of pollination is found in :
  A)
  Salvia done clear
  B)
  Bottle brush done clear
  C)
  Vallisneria done clear
  D)
  Coconut done clear
  View Solution play_arrow

• question_answer133)
  The outermost layer of maize endosperm is known as:
  A)
  Perisperm done clear
  B)
  Aleurone done clear
  C)
  Tapetum done clear
  D)
  Endothecium done clear
  View Solution play_arrow

• question_answer134)
  Edible part in drupe frail of Mangifera Indica is:
  A)
  Endocarp done clear
  B)
  Receptacle done clear
  C)
  Epicarp done clear
  D)
  Mesocarp done clear
  View Solution play_arrow

• question_answer135)
  Through which cell of the embryo sac, does the pollen tube enter the embryo sac?
  A)
  Egg cell done clear
  B)
  Central cell done clear
  C)
  Persistent synergid done clear
  D)
  Degenerated synergid done clear
  View Solution play_arrow

• question_answer136)
  The fertilization in which male gametes are carried through pollen tube is known as:
  A)
  Syngamy done clear
  B)
  Porogamy done clear
  C)
  Siphonogamy done clear
  D)
  Chalazogamy done clear
  View Solution play_arrow

• question_answer137)
  Match the following ovular structure with post fertilization structure and select the correct alternative:

  [a]	Ovule	1.	Endosperm
  [b]	Funiculus	2.	Aril
  [c]	Nucellus	3.	Seed
  [d]	Polar nuclei	4.	Perisperm

  A)
  2, 3, 4, 1 done clear
  B)
  2, 3, 1, 4 done clear
  C)
  3, 2, 4, 1 done clear
  D)
  3, 2, 1, 4 done clear
  View Solution play_arrow

• question_answer138)
  Type of pollination in Commelina is :
  A)
  Chasmogamy done clear
  B)
  Autogamy done clear
  C)
  Xenogamy done clear
  D)
  Cleistogamy done clear
  View Solution play_arrow

• question_answer139)

  Select the correct order of endosperm types :

  A)
  Cellular, helobial, free nuclear done clear
  B)
  Cellular, free nuclear, helobial done clear
  C)
  Helobial, free nuclear, cellular done clear
  D)
  Free nuclear, cellular, helobial done clear
  View Solution play_arrow

• question_answer140)
  Polyembryony occurs in :
  A)
  Citrus                done clear
  B)
  Apple done clear
  C)
  Guava done clear
  D)
  Banana done clear
  View Solution play_arrow

• question_answer141)

  Micropyle occurs in :

  1. Seed

  2. Ovule

  3. Ovary

  4. Stigma

  A)
  1, 2 and 3 are correct done clear
  B)
  1 and 2 are correct done clear
  C)
  2 and 4 are correct done clear
  D)
  1 and 3 are correct done clear
  View Solution play_arrow

• question_answer142)
  Vegetative fertilization is also called as :
  A)
  Triple fusion done clear
  B)
  True fertilization done clear
  C)
  Syngamy done clear
  D)
  Generative fertilization done clear
  View Solution play_arrow

• question_answer143)
  In double fertilization :
  A)
  Two male gametes fuse with two eggs done clear
  B)
  One male gamete fuse with the egg and the other fuses with the secondary nucleus done clear
  C)
  One male gamete fuse with the egg and the other fuses with the antipodal done clear
  D)
  One male gamete fuse with the antipodal and the other fuses with the diploid nucleus done clear
  View Solution play_arrow

• question_answer144)
  When pollen is transferred from anther of a flower to stigma of another flower of the same plant, pollination is referred to as :
  A)
  Geitonogamy done clear
  B)
  Allogamy done clear
  C)
  Xenogamy done clear
  D)
  Siphonogamy done clear
  View Solution play_arrow

• question_answer145)
  The residual persistent nucellus is known as :
  A)
  Perisperm done clear
  B)
  Pericarp done clear
  C)
  Integuments done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer146)
  Ruminate endosperm is found in:
  A)
  Cruciferae done clear
  B)
  Asteraceae done clear
  C)
  Euphorbiaceae done clear
  D)
  Annonaceae done clear
  View Solution play_arrow

• question_answer147)
  The type of pollination involving transfer of pollen grains from anther to the stigma of the same flower is known as :
  A)
  Geitonogamy done clear
  B)
  Xenogamy done clear
  C)
  Autogamy done clear
  D)
  Apogamy done clear
  View Solution play_arrow

• question_answer148)
  Endosperm is completely consumed by the developing embryo before seed maturation in
  A)
  pea, ground nut and castor done clear
  B)
  ground nut, bean and coconut done clear
  C)
  pea, ground nut and bean done clear
  D)
  none of the above done clear
  View Solution play_arrow

• question_answer149)
  Animal vectors are required for pollination in
  A)
  Vallisneria done clear
  B)
  mulberry done clear
  C)
  Cucumber done clear
  D)
  maize done clear
  View Solution play_arrow

• question_answer150)
  Which one of the following statements is correct?
  A)
  Cleistogamous flowers are always autogamous done clear
  B)
  Xenogamy occurs only by wind pollination done clear
  C)
  Chasmogamous flowers do not open at all done clear
  D)
  Geitonogamy involves the pollen and stigma of flowers of different plants done clear
  View Solution play_arrow

• question_answer151)
  Formation of activation calyx in the egg takes place
  A)
  before fertilization done clear
  B)
  after fertilization done clear
  C)
  at the time of cleavage done clear
  D)
  at the time of amphimixis done clear
  View Solution play_arrow

• question_answer152)

  Read the following statements and identify the correct options given.

  (1) Angiosperms range in size from microscopic Wolffia to tall trees of Eucalyptus

  (2) In angiosperms, the seeds are enclosed by fruits

  (3) Double fertilization is an event unique to angiosperms

  (4) In angiosperms, each cell of an embryo sac is diploid

  (5) In angiosperms, the zygote develops into an endosperm

  A)
  (1), (2) and (4) alone are correct done clear
  B)
  (1), (2) and (5) alone are correct done clear
  C)
  (1), (2) and (3) alone are correct done clear
  D)
  (2), (3) and (4) alone are correct done clear
  View Solution play_arrow

• question_answer153)

  Select the plants pollinated by water

  A. Water hyacinth

  B. Zostera

  C. Amorphophallus

  D. Valisneria

  E. Yucca

  A)
  A, D and E only done clear
  B)
  B and E only done clear
  C)
  B and D only       done clear
  D)
  B, C and D only done clear
  View Solution play_arrow

• question_answer154)
  In castor and maize plant ...........
  A)
  male and female flowers are borne by different plants done clear
  B)
  autogamy is prevented but not geitonogamy done clear
  C)
  the anthers and stigma are placed atdifferent positions to encourage cross pollination done clear
  D)
  both autogamy and geitonogamy are prevented done clear
  View Solution play_arrow

• question_answer155)
  Cleistogamous flowers are
  A)
  bisexual flowers which remain opened done clear
  B)
  bisexual flowers which remain closed done clear
  C)
  open female flower done clear
  D)
  open male flower done clear
  View Solution play_arrow

• question_answer156)
  Emasculation ensures cross-pollination in
  A)
  staminate flower done clear
  B)
  bisexual flower done clear
  C)
  neuter flower    done clear
  D)
  pistillate flower done clear
  View Solution play_arrow

• question_answer157)
  During the process of sexual reproduction in flowering plants, double fertilization involves
  A)
  fertilization of egg cell by two malegametes done clear
  B)
  fertilization of egg cell and a central cell by two male gametes brought by same pollen tube done clear
  C)
  fertilization of egg cell and a central cell by two male gametes brought by different pollen tubes done clear
  D)
  fertilization of two egg cells by two malegametes brought by same pollen tube done clear
  View Solution play_arrow

• question_answer158)
  Transfer of pollen grains from the anther to the stigma to another flower of the different plant is known as
  A)
  Autogamy done clear
  B)
  geitonogamy done clear
  C)
  xenogamy done clear
  D)
  cleistogamy done clear
  View Solution play_arrow

• question_answer159)
  During the process of artificial hybridisation if the female plant bears bisexual flowers, then emasculation is done with the help of forceps, which is
  A)
  removal of style from the lower bud before the anther dehiscence done clear
  B)
  removal of style from the flower bud after the anther dehiscence done clear
  C)
  removal of anthers from the flower bud before anther dehiscence done clear
  D)
  removal of anthers from the flower bud after the anther dehiscence done clear
  View Solution play_arrow

• question_answer160)
  An angiospermic male plant with 24 chromosomes in its pollen mother cells is crossed with female plant bearing 24 chromosomes in its root cells. What would be the ploidy of embryo and endosperm respectively formed after this cross ?
  A)
  24 and 48 done clear
  B)
  24 and 24 done clear
  C)
  48 and 72 done clear
  D)
  24 and 36 done clear
  View Solution play_arrow

• question_answer161)
  Cross pollination does not occur in
  A)
  allogamous flowers done clear
  B)
  geitonogamous flowers done clear
  C)
  cleistogamous flowers done clear
  D)
  chasmogamous flowers done clear
  View Solution play_arrow

• question_answer162)

  Select the correct statements from the following

  I. Endosperm is generally triploid inangiosperms.

  II. All angiosperms have monosporic andendosporic embryo sac.

  III. Angiosperms are characterized by double fertilization.

  IV. All angiosperms show indirect pollination and siphonogamy.

  A)
  I, II and III done clear
  B)
  II, III and IV done clear
  C)
  I, III and IV done clear
  D)
  I, II, III and IV done clear
  View Solution play_arrow

• question_answer163)

  Consider the parts labelled in 1, 2, 3, 4 and 5 respectively in the following diagram of L.S. of an embryo of grass and find out the correct sequences :

  A)
  1 - Scutellum; 2 - Coleoptile; 3 - Plumule; 4 - Radicle; 5 - Root cap done clear
  B)
  1 - Scutellum; 2 - Coleoptile; 3 - Epiblast; 4 - Radicle; 5 - Plumule done clear
  C)
  1 - Scuiellum; 2 - Coleoptile; 3 - Epiblast; 4 - Plumule; 5 - Root cap done clear
  D)
  1 - Scutellum; 2 - Coleoptile; 3 - Epiblast; 4 - Radicle; 5 - Root cap done clear
  View Solution play_arrow

• question_answer164)

  Complete the following flow chart

  Pollen mother cell \[\to \]Pollen tetrad \[\to \]Pollen grain \[\to \]Vegetative cell \[\to \] ..

  A)
  Male gamete done clear
  B)
  Tube cell done clear
  C)
  Female gamete done clear
  D)
  Generative cell done clear
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• question_answer165)

  Indicate 1, 2 and 3 in the following flow chart

  Megaspore mother cell \[\xrightarrow{1}\] Megaspores\[\xrightarrow{2}\] Embryo sac\[\xrightarrow{3}\] Egg

  A)
  1 - Mitosis; 2 - Mitosis; 3 - Mitosis done clear
  B)
  1 - Meiosis; 2 - Amitosis; 3 - Mitosis done clear
  C)
  1 - Meiosis; 2 - Mitosis; 3 - Amitosis done clear
  D)
  1 - Meiosis; 2 - Mitosis; 3 - Mitosis done clear
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