A flower that produces only pollens is called as:

1. Perfect flower 2. Staminode
3. Dioecious 4. Staminate

Subtopic:  Sexual Reproduction |
 69%
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Identify the incorrectly matched pair:
1. Cockroach - Unisexual animal
2. Chara - Monoecious plant
3. Marchantia - Dioecious plant
4. Sweet potato - Unisexual flower

Subtopic:  Sexual Reproduction |
 72%
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Consider the following statements:

I: Meiosis never occurs in organisms that are haploid
II: Gametes are haploid and the parent plant body from which they arise must be diploid


1. Only I is correct
2. Only II is correct
3. Both I and II are incorrect
4. Both I and II are correct

Subtopic:  Sexual Reproduction | Events during Sexual reproduction |
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Identify the incorrectly matched pair:

 

Organism

Chromosome number in a meiocyte

1.

Ophioglossum

630

2.

Housefly

12

3.

Maize

20

4.

Butterfly

380

Subtopic:  Sexual Reproduction |
 60%
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In several simple plants like algae, bryophytes, and pteridophytes, water is the medium through which gamete transfer takes place. To increase the chances of fertilization, such plants:

1. Produce a large number of female gametes that are non-motile
2. Produce a large number of male gametes that is several thousand times the number of female gametes produced
3. Produce a large number of female gametes that is several thousand times the number of male gametes produced
4. Do not have the capability of reproducing asexually
Subtopic:  Asexual Reproduction |
 90%
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A reproductive strategy that involves the development of a female (rarely a male) gamete (sex cell) without fertilization is called:

1. Parthenogenesis 2. Parthenocarpy
3. Panmixis 4. Amphimixis
Subtopic:  Sexual Reproduction |
 84%
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Consider the two statements:

I: Organisms exhibiting external fertilisation show great synchrony between the sexes.
II: Such organisms release a large number of gametes into the surrounding medium (water).

1. Both I and II are correct and II explains I.
2. Both I and II are correct but II does not explain I.
3. I is correct but II is incorrect.
4. Both I and II are incorrect.
Subtopic:  Sexual Reproduction |
 52%
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A major disadvantage of external fertilization is:

1. Lack of variation in the progeny
2. The number of progeny produced can only be one or few
3. The offspring are extremely vulnerable to predators threatening their survival up to adulthood
4. The progeny have a very short life span and a low reproductive potential
Subtopic:  Sexual Reproduction |
 91%
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When compared to external fertilization, in cases where internal fertilization takes place in sexually reproducing organisms:

1. The progeny are afforded better protection
2. The number of male gametes are highly reduced while the number of female gametes is increased
3. Male gamete is non-motile and the female gamete has to reach it
4. In seed plants the non-motile male gametes are carried to the female gamete by pollen tubes

Identify the correct statements from the options given below :
I. Only I and II are correct
II. Only III and IV are correct
III. Only I and IV are correct
IV. Only II and III are correct

Subtopic:  Sexual Reproduction |
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What is the most important feature that enabled reptiles, birds, and mammals to become highly successful on land when compared to amphibians?

1.Respiration by lungs2.Calcareous eggs
3.Amnion4.Scaly skin

Subtopic:  Reproduction |

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