Q. No.Consider the given two statements:
Statement I:
When offspring is produced by a single parent but always with the involvement of gamete formation, reproduction is asexual.
Statement II:
When two parents [opposite sex] participate in the reproductive process and also involve the fusion of male and female gametes, it is called sexual reproduction.
1.
Statement I is correct, Statement II is incorrect.
2.
Statement I is correct, Statement II is correct.
3.
Statement I is incorrect, Statement II is correct.
4.
Statement I is incorrect, Statement II is incorrect.
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| Statement I: | Animals that have oestrous cycles resorb the endometrium if conception does not occur during that cycle and animals that have menstrual cycles shed the endometrium through menstruation instead. |
| Statement II: | In species with oestrous cycles, females are generally only sexually active during the oestrus phase of their cycle and females of species with menstrual cycles can be sexually active at any time in their cycle, even when they are not about to ovulate. |
| 1. | Statement I is correct, Statement II is incorrect. |
| 2. | Statement I is correct, Statement II is correct. |
| 3. | Statement I is incorrect, Statement II is correct. |
| 4. | Statement I is incorrect, Statement II is incorrect. |
| 1. | A is the female thallus of Marchantia and B is the male thallus of Marchantia |
| 2. | A is the male thallus of Marchantia and B is the female thallus of Marchantia |
| 3. | A is the female thallus of Chara and B is the male thallus of Chara |
| 4. | A is the male thallus of Chara and B is the female thallus of Chara |
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| Statement I: | In organisms with external fertilisation, zygote is formed in an external medium. [usually water] |
| Statement II: | In organisms with internal fertilisation, zygote is formed inside the body of the organism. |
| 1. | Statement I is correct, Statement II is incorrect. |
| 2. | Statement I is correct, Statement II is correct. |
| 3. | Statement I is incorrect, Statement II is correct. |
| 4. | Statement I is incorrect, Statement II is incorrect. |
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| Assertion (A): | The chances of survival of young ones are greater in viviparous organisms. |
| Reason (R): | In such animals, fertilised eggs covered by a hard calcareous shell are laid in a safe place in the environment. |
| 1. | (A) is true but (R) is false. |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 4. | (A) is false but (R) is true. |
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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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I: The zygote develops into the embryo.
II. The ovules develop into the seed.
III. The ovary develops into the fruit.
IV. A thick protective fruit wall called pericarp develops.
1. Only I, II and IV are correct
2. Only II, III and IV are correct
3. Only I, II and III are correct
4. I, II, III and IV are correct
Corresponding to ‘monoecious’ in a plant, the bisexual condition in a fungus would be best described as:
| 1. | Homothallic | 2. | Heterothallic |
| 3. | Hermaphrodite | 4. | Complete ad perfect |
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