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

done Case Based - Sexual Reproduction in Flowering Plants Total Questions - 27

• question_answer1)

  wStudy the given figure of embryo sac in angiosperms and answer the questions that follows

  (i) Embryo sac is also called

  A)
  female gamete done clear
  B)
  synergids done clear
  C)
  female gametophyte done clear
  D)
  egg of angiosperm done clear
  View Solution play_arrow

• question_answer2)

  Study the given figure of embryo sac in angiosperms and answer the questions that follows

  (ii) The arrangement of the nuclei in a normal embryo sac in the dicot

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

• question_answer3)

  Study the given figure of embryo sac in angiosperms and answer the questions that follows

  (iii) Antipodal nuclei in a typical angiospermic embryo sac which found towards

   
  A)
  micropylarend done clear
  B)
  in the middle (polar) region done clear
  C)
  chalazal end done clear
  D)
  on the lateral sides done clear
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• question_answer4)

  Study the given figure of embryo sac in angiosperms and answer the questions that follows

  (iv) What does the labelled part A do at the entrance into ovule?

   
  A)
  It brings about opening of the pollen tube done clear
  B)
  It guides pollen tube from a synergid to egg done clear
  C)
  It helps in the entry of pollen tube into a synergid done clear
  D)
  It prevents entry of more than one pollen tube into the embryo sac. done clear
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• question_answer5)

  Direction Read the following and answer the questions from given below

  Pollination is the act of transferring pollen grains from male anther of a flower to the female stigma. The goal of every living organism including plants is to create offspring for the next generation. One of the ways that plants can produce offspring is by making seeds which then germinate to produce new plants. Two types of flowers with their pollination is seen in plants are chasmogamy and cleistogamy. Chasmogamous flowers have strikingly coloured petals and nectar guides/nectaries in contrast to cleistogamous flowers which are minute bud-like.

  (i) Cleistogamous flowers are strictly autogamous because, they remain

  A)
  always open                   done clear
  B)
  always close done clear
  C)
  always fragraned             done clear
  D)
  brightly coloured done clear
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• question_answer6)

  Direction Read the following and answer the questions from given below

  Pollination is the act of transferring pollen grains from male anther of a flower to the female stigma. The goal of every living organism including plants is to create offspring for the next generation. One of the ways that plants can produce offspring is by making seeds which then germinate to produce new plants. Two types of flowers with their pollination is seen in plants are chasmogamy and cleistogamy. Chasmogamous flowers have strikingly coloured petals and nectar guides/nectaries in contrast to cleistogamous flowers which are minute bud-like.

  (ii) In chasmogamy, pollination takes place in

  A)
  open flower   done clear
  B)
  closed flower done clear
  C)
  large flower        done clear
  D)
  geitonogamy flower done clear
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• question_answer7)

  Direction Read the following and answer the questions from given below

  Pollination is the act of transferring pollen grains from male anther of a flower to the female stigma. The goal of every living organism including plants is to create offspring for the next generation. One of the ways that plants can produce offspring is by making seeds which then germinate to produce new plants. Two types of flowers with their pollination is seen in plants are chasmogamy and cleistogamy. Chasmogamous flowers have strikingly coloured petals and nectar guides/nectaries in contrast to cleistogamous flowers which are minute bud-like.

  (iii) Advantage of cleistogamy is

  A)
  higher genetic variability done clear
  B)
  more vigorous offspring done clear
  C)
  no dependence on pollinators done clear
  D)
  vivipary done clear
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• question_answer8)

  Direction Read the following and answer the questions from given below

  Pollination is the act of transferring pollen grains from male anther of a flower to the female stigma. The goal of every living organism including plants is to create offspring for the next generation. One of the ways that plants can produce offspring is by making seeds which then germinate to produce new plants. Two types of flowers with their pollination is seen in plants are chasmogamy and cleistogamy. Chasmogamous flowers have strikingly coloured petals and nectar guides/nectaries in contrast to cleistogamous flowers which are minute bud-like.

  (iv) Even in the absence of pollinating agents, seed-setting is assured in

  A)
  Commelina       done clear
  B)
  Zostera done clear
  C)
  Salvia               done clear
  D)
  Fig done clear
  View Solution play_arrow

• question_answer9)

  Direction Read the following and answer the questions from given below

  Pollination is the act of transferring pollen grains from male anther of a flower to the female stigma. The goal of every living organism including plants is to create offspring for the next generation. One of the ways that plants can produce offspring is by making seeds which then germinate to produce new plants. Two types of flowers with their pollination is seen in plants are chasmogamy and cleistogamy. Chasmogamous flowers have strikingly coloured petals and nectar guides/nectaries in contrast to cleistogamous flowers which are minute bud-like.

  (v) Identify the features of the type of flower given below.

  Choose the correct conclusions drawn from this figure.

  I. Cleistogamous flowers are not dependent on pollinators.

  II. Chasmogamous flowers are bisexual.

  III. Chasmogamous flowers do not show cross-pollination.

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

• question_answer10)

  Direction Read the following and answer the questions from given below

  Seed is the basis of our agriculture. Dehydration and dormancy of mature seeds are crucial for storage of seeds which can be used as food throughout the year and also to raise crop in the next season. Seeds remain alive after they are dispersed for few to several years. Also number of seeds in a fruit can also vary. Can you think of some plants in which fruits contain very large number of seeds. Orchid fruits are one such category. Its each fruit contains thousands of tiny seeds which when dispersed produces thousands orchid plants. This is so fascinating as how a tiny structure can produce such a large biomass over the years.

  (i) Why does seed dormancy occur?

  A)
  Due to favourable conditions done clear
  B)
  Due to unfavourable conditions done clear
  C)
  Due to embryonic conditions done clear
  D)
  Due to specific endosperm conditions done clear
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• question_answer11)

  Direction Read the following and answer the questions from given below

  Seed is the basis of our agriculture. Dehydration and dormancy of mature seeds are crucial for storage of seeds which can be used as food throughout the year and also to raise crop in the next season. Seeds remain alive after they are dispersed for few to several years. Also number of seeds in a fruit can also vary. Can you think of some plants in which fruits contain very large number of seeds. Orchid fruits are one such category. Its each fruit contains thousands of tiny seeds which when dispersed produces thousands orchid plants. This is so fascinating as how a tiny structure can produce such a large biomass over the years.

  (ii) An example of a very old viable seed excavated from Arctic Tundra in which seed gets germinated and flower after an estimated record of 10,000 years of dormancy is

  A)
  Victoria done clear
  B)
  Lupinus arcticus done clear
  C)
  Phoenix dactylifem done clear
  D)
  Strobilanthes kunthiana done clear
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• question_answer12)

  Direction Read the following and answer the questions from given below

  Seed is the basis of our agriculture. Dehydration and dormancy of mature seeds are crucial for storage of seeds which can be used as food throughout the year and also to raise crop in the next season. Seeds remain alive after they are dispersed for few to several years. Also number of seeds in a fruit can also vary. Can you think of some plants in which fruits contain very large number of seeds. Orchid fruits are one such category. Its each fruit contains thousands of tiny seeds which when dispersed produces thousands orchid plants. This is so fascinating as how a tiny structure can produce such a large biomass over the years.

  (iii) Seed formation without fertilisation in flowering plants involves the process of

  A)
  budding done clear
  B)
  somatic hybridisation done clear
  C)
  apomixes done clear
  D)
  sporulation done clear
  View Solution play_arrow

• question_answer13)

  Direction Read the following and answer the questions from given below

  Seed is the basis of our agriculture. Dehydration and dormancy of mature seeds are crucial for storage of seeds which can be used as food throughout the year and also to raise crop in the next season. Seeds remain alive after they are dispersed for few to several years. Also number of seeds in a fruit can also vary. Can you think of some plants in which fruits contain very large number of seeds. Orchid fruits are one such category. Its each fruit contains thousands of tiny seeds which when dispersed produces thousands orchid plants. This is so fascinating as how a tiny structure can produce such a large biomass over the years.

  (iv) Which of the following plants does not produce very large number of seeds?

  A)
  Orobonche                     done clear
  B)
  Striqa done clear
  C)
  Ficus                             done clear
  D)
  Apple done clear
  View Solution play_arrow

• question_answer14)

  Direction Read the following and answer the questions from given below

  Seed is the basis of our agriculture. Dehydration and dormancy of mature seeds are crucial for storage of seeds which can be used as food throughout the year and also to raise crop in the next season. Seeds remain alive after they are dispersed for few to several years. Also number of seeds in a fruit can also vary. Can you think of some plants in which fruits contain very large number of seeds. Orchid fruits are one such category. Its each fruit contains thousands of tiny seeds which when dispersed produces thousands orchid plants. This is so fascinating as how a tiny structure can produce such a large biomass over the years.

  Assertion [A] Some fruits are seedless or contain non-viable seeds.

  Reason [R] They are produced without fertilisation.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  Both A and Rare false done clear
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• question_answer15)

  Study the given diagram of a mature embryo given below and answer the questions that follows

  (i) The embryo in sunflower has

   
  A)
  no cotyledon                  done clear
  B)
  two cotyledons done clear
  C)
  one cotyledon                 done clear
  D)
  many cotyledons done clear
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• question_answer16)

  Study the given diagram of a mature embryo given below and answer the questions that follows

  (ii) In a cereal grain, the single cotyledon of embryo is represented by

   
  A)
  coleoptile                       done clear
  B)
  coleorhiza done clear
  C)
  scutellum         done clear
  D)
  No of these done clear
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• question_answer17)

  Study the given diagram of a mature embryo given below and answer the questions that follows

  (iii) The ephemeral structure which anchors the embryo and pushes it into the nutritional zone of the embryo sac is called

   
  A)
  A  done clear
  B)
  B       done clear
  C)
  C                      done clear
  D)
  D done clear
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• question_answer18)

  Study the given diagram of a mature embryo given below and answer the questions that follows

  (iv) Dicot embryo Consists of

   
  A)
  radicle and plumule done clear
  B)
  radicle, plumule, cotyledons and sometimes endosperm done clear
  C)
  radicle, plumule, cotyledons and tegmen done clear
  D)
  radicle, plumulercotyledons, tegmen and testa done clear
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• question_answer19)

  Direction Read the following and answer the questions from given below

  The ovule or the megasporangium develops as a small protuberance of the placental tissue. In the very young ovule, a single hypodermal cell is differentiated as the archesporium. This archesporium cell may or may not cut off some parietal cells and then becomes the Megaspore Mother Cell (MMC). The MMC undergoes division to form megaspore cells. Meanwhile two integuments develop from the base of the ovule.

  (i) Which of these cells is the largest cell of the ovule?

  A)
  Antipodal cell done clear
  B)
  Central cell done clear
  C)
  Megaspore mother cell done clear
  D)
  The size of the cells varies from species to species and none of the given above can be treated as largest done clear
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• question_answer20)

  Direction Read the following and answer the questions from given below

  The ovule or the megasporangium develops as a small protuberance of the placental tissue. In the very young ovule, a single hypodermal cell is differentiated as the archesporium. This archesporium cell may or may not cut off some parietal cells and then becomes the Megaspore Mother Cell (MMC). The MMC undergoes division to form megaspore cells. Meanwhile two integuments develop from the base of the ovule.

  (ii) In angiosperms, microsporogenesis

  A)
  involve meiosis done clear
  B)
  occur in ovule done clear
  C)
  occur in anther done clear
  D)
  form gametes without further divisions done clear
  View Solution play_arrow

• question_answer21)

  Direction Read the following and answer the questions from given below

  The ovule or the megasporangium develops as a small protuberance of the placental tissue. In the very young ovule, a single hypodermal cell is differentiated as the archesporium. This archesporium cell may or may not cut off some parietal cells and then becomes the Megaspore Mother Cell (MMC). The MMC undergoes division to form megaspore cells. Meanwhile two integuments develop from the base of the ovule.

  (iii) Megasporogenesis is the

  A)
  formation of fruits done clear
  B)
  formation of seeds done clear
  C)
  formation of megaspores done clear
  D)
  Both [b] and [c] done clear
  View Solution play_arrow

• question_answer22)

  Direction Read the following and answer the questions from given below

  The ovule or the megasporangium develops as a small protuberance of the placental tissue. In the very young ovule, a single hypodermal cell is differentiated as the archesporium. This archesporium cell may or may not cut off some parietal cells and then becomes the Megaspore Mother Cell (MMC). The MMC undergoes division to form megaspore cells. Meanwhile two integuments develop from the base of the ovule.

  (iv) Megaspore mother cell is found near the region of

  A)
  micropyle           done clear
  B)
  chalaza done clear
  C)
  nucellus             done clear
  D)
  integuments done clear
  View Solution play_arrow

• question_answer23)

  Direction Read the following and answer the questions from given below

  The ovule or the megasporangium develops as a small protuberance of the placental tissue. In the very young ovule, a single hypodermal cell is differentiated as the archesporium. This archesporium cell may or may not cut off some parietal cells and then becomes the Megaspore Mother Cell (MMC). The MMC undergoes division to form megaspore cells. Meanwhile two integuments develop from the base of the ovule.

  Assertion [A] Megaspore mother cell undergoes meiosis to produce four megaspores.

  Reason [R] Megaspore mother cell and megaspore both are haploid.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  Both A and Rare false done clear
  View Solution play_arrow

• question_answer24)

  Observe the given diagram of enlarged view of one microsporangium showing wall layers and answer questions that follows

  (i) The number of microsporangia present in the anther is

   
  A)
  one                               done clear
  B)
  three done clear
  C)
  two                               done clear
  D)
  four done clear
  View Solution play_arrow

• question_answer25)

  Observe the given diagram of enlarged view of one microsporangium showing wall layers and answer questions that follows

  (ii) Microsporangia develops into

   
  A)
  megagametes     done clear
  B)
  pollens done clear
  C)
  microgametes     done clear
  D)
  pollen sacs done clear
  View Solution play_arrow

• question_answer26)

  Observe the given diagram of enlarged view of one microsporangium showing wall layers and answer questions that follows

  (iii) Centre of each microsporangium is occupied by

   
  A)
  sporogenous tissue done clear
  B)
  tapetum done clear
  C)
  central tissue done clear
  D)
  microspore mother cell done clear
  View Solution play_arrow

• question_answer27)

  Observe the given diagram of enlarged view of one microsporangium showing wall layers and answer questions that follows

  (iv) Which of the following wall layer does not helps in dehiscence of anther?

   
  A)
  Epidermis                       done clear
  B)
  Endothecium done clear
  C)
  Middle layer                   done clear
  D)
  Tapetum done clear
  View Solution play_arrow