-
question_answer1)
The diagram shows a section through the male reproductive system. What will be the effect, if gland X is removed?
A)
Fewer sperms win be formed. done
clear
B)
Fewer sperms will be stored. done
clear
C)
Less testosterone will be produced. done
clear
D)
Sperms will become less active. done
clear
View Solution play_arrow
-
question_answer2)
In generative fertilization, a _____ fuses with a _____.
A)
Polar nucleus, Secondary nucleus done
clear
B)
Male gamete, Polar nucleus done
clear
C)
Male gamete, Female gamete done
clear
D)
Female gamete, Secondary nucleus done
clear
View Solution play_arrow
-
question_answer3)
Select the incorrect statement.
A)
Carpel is a part of androecium. done
clear
B)
Secondary nuclei may form a diploid polar nucleus prior to fertilization. done
clear
C)
Synergids have filiform apparatus that guides the entry of pollen tube into the nucellus. done
clear
D)
All of these done
clear
View Solution play_arrow
-
question_answer4)
New plants may be grown from groups of cells that are taken from other plants. The given diagram shows parts of a plant X.
|
|
Cell samples obtained from which of the labelled structures will grow into new plants that are genetically identical to plant X?
|
A)
P done
clear
B)
Q done
clear
C)
R done
clear
D)
S done
clear
View Solution play_arrow
-
question_answer5)
______ is a product of meiosis.
A)
Megaspore mother cell done
clear
B)
Microspore mother cell done
clear
C)
Primary endosperm nucleus done
clear
D)
Megaspore done
clear
View Solution play_arrow
-
question_answer6)
Read the following statements carefully and select the option which correctly identifies true (T) and false (F) ones.
(i) Grafting involves two closely related dicotyledonous plants each having vascular cambium. |
(ii) In Bryophyllum, adventitious buds of leaves develop into new plant. |
(iii) Gastrulation period in human female is of 280 days. |
(iv) Asexual reproduction is a common means of rapidly increasing organisms under unfavourable conditions. |
A)
B)
C)
D)
View Solution play_arrow
-
question_answer7)
Select the barrier method of contraception among the following.
A)
Oral pill done
clear
B)
Femidom done
clear
C)
Copper T done
clear
D)
Vasectomy done
clear
View Solution play_arrow
-
question_answer8)
The given graph shows the hormonal changes during a normal menstrual cycle. What would be a likely consequence if the hormone represented by graph Q is lacking in an adult female?
A)
The uterine lining might not be sufficiently stable for implantation of fertilized ovum. done
clear
B)
Levels of the hormone represented by graph P would be higher than normal. done
clear
C)
Fertilization of ovum would fail to occur. done
clear
D)
There would be no significant effect since the functions of the hormones overlap. done
clear
View Solution play_arrow
-
question_answer9)
Select the viral STD among the following.
A)
Gonorrhoea done
clear
B)
Syphilis done
clear
C)
Hepatitis B done
clear
D)
Chlamydiasis done
clear
View Solution play_arrow
-
question_answer10)
Which of the following comparisons of the two birth control methods used by women are correct?
A)
B)
C)
D)
View Solution play_arrow
-
question_answer11)
Seminal vesicle adds ____ into semen.
A)
Fructose done
clear
B)
Mucus done
clear
C)
Sperms done
clear
D)
Both (a) and (b) done
clear
View Solution play_arrow
-
question_answer12)
Ovaries perform the function of
A)
Progesterone secretion done
clear
B)
Estrogen secretion done
clear
C)
Ovum formation done
clear
D)
All of these. done
clear
View Solution play_arrow
-
question_answer13)
Which of the following is a characteristic of wind pollinated flowers?
A)
Pollen grains are heavy and dry whereas the stigma is short and sticky. done
clear
B)
Flowers are brightly colored. done
clear
C)
Pollen grains are light, small and dusty whereas the stigma is hairy and feathery. done
clear
D)
Flowers are small with nectar and fragrance. done
clear
View Solution play_arrow
-
question_answer14)
Which of the following statements is incorrect?
A)
Placenta allows exchange of materials between mother and fetus. done
clear
B)
The fetal part of the placenta consists of the cells of the chorion which produce projections called chorionic villi. done
clear
C)
Antibody cannot cross the placenta from mother to fetus. done
clear
D)
Placenta secretes pregnancy hormones required for supporting fetal growth and metabolic changes in mother during pregnancy. done
clear
View Solution play_arrow
-
question_answer15)
Match column I with column II and select the correct option from the codes given below.
Column I |
Column II |
(a) Rhizopus |
(i) Binary fission |
(b) Planaria |
(ii) Budding |
(c) Leishmania |
(iii) Spore formation |
(d) Yeast |
(iv) Regeneration |
A)
(a) - (iii), (b) - (iv), (c) - (i), (d) - (ii) done
clear
B)
(a) - (iii), (b) - (i), (c) - (iv), (d) - (ii) done
clear
C)
(a) - (ii), (b) - (iii), (c) - (i), (d) - (iv) done
clear
D)
(a) - (ii), (b) - (iv), (c) - (i), (d) - (iii) done
clear
View Solution play_arrow
-
question_answer16)
The given figure shows monthly changes in the human ovary during the reproductive cycle.
|
|
Which of the following statements is correct regarding the labelled structures?
|
A)
Before puberty, only structure T undergoes meiosis. done
clear
B)
The hormone produced by structure R stimulates the pituitary gland to secrete luteinising hormone. done
clear
C)
The hormone produced by structure S is responsible for the development of female secondary sex characters. done
clear
D)
The hormone produced by P and Q stimulates the proliferation of the endometrial lining of the uterine wall. done
clear
View Solution play_arrow
-
question_answer17)
Refer to the given figure of lateral view of human male reproductive system and select the incorrect statements.
(i) Part E stores sperms and secretes a fluid that nourishes them. |
(ii) Part F carries sperms from E. |
(iii) Part G produces 25% of the volume of semen and contains citric acid. |
(iv) Part H represents primary sex organ of male that produces diploid gametes. |
(v) Part I carries both sperms and urine to penis. |
(vi) Part J is extra abdominal pouch that keeps testicular temperature \[2-2.5{}^\circ C\text{ }\] higher than the body temperature. |
A)
(iii), (iv) and (vi) only done
clear
B)
(ii), (v) and (vi) only done
clear
C)
(i), (ii) and (iv) only done
clear
D)
(i), (iii) and (v) only done
clear
View Solution play_arrow
-
question_answer18)
The given diagram shows the carpel of an insect pollinated flower. What is the most likely reason for the non-germination of pollen grain Z?
A)
Pollen grains X and V were brought to the stigma earlier, therefore, their germination inhibited the germination of pollen grain Z. done
clear
B)
Pollen grain Z was brought to the flower by wind, while pollen grains X and Y were brought to the flower by insects. done
clear
C)
Pollen grain Z lacks protrusions that allow it to adhere properly onto the stigma surface. done
clear
D)
Pollen grain Z comes from a flower of an incompatible species. done
clear
View Solution play_arrow
-
question_answer19)
A student decides to study the impact of removing certain flower parts on fruit formation in plant species X. He chooses three separate plants that are growing in the same plot under uniform conditions. The data is given in the table below.
Plants
|
Part removed
|
Impact on formation
|
1
|
Another
|
30% less fruit formed than average plants in the plot
|
2
|
Stigma
|
No fruit formed
|
3
|
Petal
|
No significant impact
|
Which of the following can be inferred from the above data?
A)
Anthers and stigmas are crucial in sexual reproduction in species X. done
clear
B)
Pollen grains are probably unable to germinate if they land on other parts of the carpel besides the stigma. done
clear
C)
Species X is likely to be wind-pollinated. done
clear
D)
Species X relies completely on cross- pollination. done
clear
View Solution play_arrow
-
question_answer20)
Each sperm contains a special organelle known as an acrosome that contains hydrolytic enzymes. It also contains numerous mitochondria. What are the likely functions of these organelles in relation to the sperms' overall functions?
A)
B)
C)
D)
View Solution play_arrow