Q. No.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 offspring |
| 3. | offspring are formed at different times |
| 4. | DNA of parent and offspring are completely different |
Amoeba and yeast reproduce asexually by fission and budding respectively, because they are
1. microscopic organisms
2. heterotrophic organisms
3. unicellular organisms
4. uninucleate organisms
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. |
Choose the correct statements from the options below.
1. l and lV
2. l and ll
3. ll and lll
4. l and lV
A multicellular, filamentous alga exhibits a type of sexual life cycle in which the meiotic division occurs after the formation of 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
The male gametes of 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
Given below are a few statements related to external fertilisation.
| 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 fertilisation. |
| IV. | Offspring formed as a result of external fertilisation have better chances of survival than those formed inside an organism. |
Choose the correct statements.
1. lll and lV
2. l and lll
3. ll and lV
4. l and lV
Which of the following situations correctly describe the similarity between an angiospermic egg and a human egg?
| I. | Eggs of both are formed only once in a lifetime. |
| II. | Both the angiosperm egg and human egg are stationary. |
| III. | Both the angiosperm egg and human egg are motile transported. |
| IV. | Syngamy in both results in the formation of zygote. |
Choose the correct answer from the options given below.
1. ll and lV
2. only lV
3. lll and lV
4. l and lV
Q.10 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
Offspring formed by sexual reproduction exhibit more variation than those formed by asexual reproduction because:
| 1. | sexual reproduction is a lengthy process |
| 2. | gametes of parents have a qualitatively different genetic composition |
| 3. | genetic material comes from parents of two different species |
| 4. | greater amount of DNA is involved in sexual reproduction |
Choose the correct statement from amongst the following.
1. Dioecious (hermaphrodite) organisms are seen only in animals.
2. Dioecious organisms are seen only in plants.
3. Dioecious organisms are seen in both plants and animals.
4. Dioecious organisms are seen only in invertebrates.
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