Q. No.Identify the correct statements:
I.
Clear-cut vegetative, juvenile, and senescent phases are seen only in perennial plants.
II.
Neelakurinji flowers once in 12 years.
III.
Bamboo flowers only once in their lifetime.
1.
Only III
2.
Only II and III
3.
Only I and II
4.
I, II, and III
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Birds in captivity (as in poultry farms) :
| 1. | lay eggs seasonally |
| 2. | can be made to lay eggs throughout the year |
| 3. | exhibit estrous cycles |
| 4. | exhibit menstrual cycles |
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Menstrual cycles occur in:
1. all animal females
2. all female mammals
3. female monkeys, apes, and humans
4. only in human females
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Which of the following is the most critical event of sexual reproduction?
| 1. | Gametogenesis | 2. | Gamete Transfer |
| 3. | Fertilization | 4. | Embryogenesis |
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A plant with both male flowers and female flowers is called as:
| 1. | Unisexual | 2. | Bisexual |
| 3. | Dioecious | 4. | Monoecious |
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A flower that produces only pollens is called as:
| 1. | Perfect flower | 2. | Staminode |
| 3. | Dioecious | 4. | Staminate |
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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
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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
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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 |
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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 |
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