Q. No.The process of sexual reproduction which involves meiosis and syngamy is:
1.
Apomixis
2.
Amphimixis
3.
Agamospermy
4.
Diplospory
Grafting is not successful in monocots but is successful in dicots because they have:
1. Vascular bundles arranged in a ring
2. Cambium for secondary growth
3. Vessels with elements arranged end to end
4. Cork cambium
A scion is grafted on a stock. The quality of fruits produced will depend upon the genotype of:
1. Scion
2. Stock
3. Both 1. and 2.
4. None of the above
A prominent Indian botanist noted chiefly for his invention of the technique of test-tube fertilization of angiosperms is:
| 1. | Panchanan Maheshwari | 2. | M. S. Swaminathan |
| 3. | Gurdev Khush | 4. | Y. Subbarow |
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Consider the two statements:
| I: | Lifespan of living organisms are correlated with their body size |
| II: | Almost always, larger the body size more will be the lifespan |
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 and II is incorrect.
4. Both I and II are incorrect.
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Which of the following is not always true for sexual mode of reproduction?
I. Separate sexes in the species
II. Gamete formation
III. Fertilization
| 1. | Only I | 2. | Only III |
| 3. | Both I and III | 4. | Both II and III |
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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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