Q. No.A few statements describing certain features of reproduction are given below:
| i. | Gametic fusion takes place |
| ii. | Transfer of genetic material takes place |
| iii. | Reduction division takes place |
| iv. | Progeny has some resemblance with parents |
Select the options that are true for both asexual and sexual reproduction from the options given below:
| 1. | i and ii |
| 2. | ii and iii |
| 3. | ii and iv |
| 4. | i and iii |
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The term ‘clone’ cannot be applied to offspring formed by sexual reproduction because:
| 1. | Offspring do not possess exact copies of parental DNA |
| 2. | DNA of only one parent is copied and passed on to the offspring |
| 3. | Offspring are formed at different times |
| 4. | DNA of the parent and offspring are completely different. |
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Asexual method of reproduction by binary fission is common to which of the following?
| 1. | Some eukaryotes |
| 2. | All eukaryotes |
| 3. | Some prokaryotes |
| 4. | All prokaryotes |
Choose the correct option from the following:
| 1. | i and ii | 2. | ii and iii |
| 3. | i and iii | 4. | iii and iv |
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A few statements with regard to sexual reproduction are given below:
| i. | Sexual reproduction does not always require two individuals |
| ii. | Sexual reproduction generally involves gametic fusion |
| iii. | Meiosis never occurs during sexual reproduction |
| iv. | External fertilisation is a rule during sexual reproduction |
| 1. | i and iv | 2. | i and ii |
| 3. | ii and iii | 4. | i and iii |
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A multicellular, filamentous alga exhibits a type of sexual life cycle in which the meiotic division occurs after the formation of a zygote. The adult filament of this alga has:
1. haploid vegetative cells and diploid gametangia
2. diploid vegetative cells and diploid gametangia
3. diploid vegetative cells and haploid gametangia
4. haploid vegetative cells and haploid gametangia
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The male gametes of a rice plant have 12 chromosomes in their nucleus. The chromosome number in the female gamete, zygote, and the cells of the seedling will be, respectively:
| 1. | 12, 24, 12 | 2. | 24, 12, 12 |
| 3. | 12, 24, 24 | 4. | 24, 12, 24 |
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Given below are a few statements related to external fertilization. Choose the correct statements.
| i. | The male and female gametes are formed and released simultaneously. |
| ii. | Only a few gametes are released into the medium. |
| iii. | Water is the medium in a majority of organisms exhibiting external fertilization. |
| iv. | Offspring formed as a result of external fertilization have a better chance of survival than those formed inside an organism. |
| 1. | iii and iv | 2. | i and iii |
| 3. | ii and iv | 4. | i and iv |
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The statements given below describe certain features that are observed in the pistil of flowers.
i. Pistil may produce more than one seed.
ii. Each carpel may have more than one ovule.
iii. Each carpel has only one ovule.
iv. Pistil has only one carpel.
Choose the statements that are true from the options below:
| 1. | i and ii | 2. | i and iii |
| 3. | ii and iv | 4. | iii and iv |
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Which of the following situations correctly describes the similarity between an angiosperm egg and a human egg?
| 1. | Eggs of both are formed only once in a lifetime |
| 2. | Both the angiosperm egg and human egg are stationary |
| 3. | Both the angiosperm egg and human egg are mobile |
| 4. | Syngamy in both results in the formation of zygote |
Choose the correct answer from the options given below:
| 1. | ii and iv | 2. | iv only |
| 3. | iii and iv | 4. | i and iv |
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Appearance of vegetative propagules from the nodes of plants such as sugarcane and ginger is mainly because:
| 1. | Nodes are shorter than internodes |
| 2. | Nodes have meristematic cells |
| 3. | Nodes are located near the soil |
| 4. | Nodes have non-photosynthetic cells |
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