Q. No.| I: | Life spans of organisms are not necessarily correlated with their sizes. |
| II: | There is no natural death in single-celled organisms. |
| III. | Reproduction enables the continuity of the species, generation after generation |
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
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| 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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There are various types of reproduction. The type of reproduction adopted by an organism depends on:
| 1. | The habitat and morphology of the organism |
| 2. | Morphology of the organism |
| 3. | Morphology and physiology of the organism |
| 4. | The organism’s habitat, physiology, and genetic makeup |
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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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| Assertion (A): | The term clone can be used to describe the progeny of asexual reproduction. |
| Reason (R): | The progeny of asexual reproduction are morphologically and genetically similar individuals. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
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| I: | The nucleus does not divide at all and the bud does not have genetic material. |
| II: | The division is unequal and small buds are produced that remain attached initially to the parent cell which, eventually get separated and mature into new yeast organisms. |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
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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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Encystation during unfavorable conditions followed by multiple fission and sporulation when favorable conditions return is seen in:
| 1. | Sponges | 2. | Penicillium |
| 3. | Amoeba | 4. | Hydra |
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Identify the incorrect statement :
| 1. | In asexual reproduction, the offspring produced are morphologically and genetically identical to the parent |
| 2. | Zoospores are sexual reproductive structures |
| 3. | In asexual reproduction, a single parent produces offspring with or without the formation of gametes |
| 4. | Conidia are asexual structures in Penicillium |
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Match the asexual reproductive structure in COLUMN I with organisms in COLUMN II and select the correct option from the codes given:
|
|
COLUMN I |
|
COLUMN II |
|
A. |
Zoospore |
a. |
Penicillium |
|
B. |
Conidia |
b. |
Chlamydomonas |
|
C. |
Buds |
c. |
Sponge |
|
D. |
Gemmule |
d. |
Hydra |
| Options: | (A) | (B) | (C) | (D) |
| 1. | a | b | c | d |
| 2. | d | c | b | a |
| 3. | c | d | a | b |
| 4. | b | a | d | c |
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