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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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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I. | (a) shows aplanospores in Chlamydomonas |
II. | (b) shows exogenous basidia in smut fungus |
III. | (c) shows budding in Hydra |
IV. | (d) shows gemmules in sponge |
1. | Only I and II | 2. | Only II and III |
3. | Only II and IV | 4. | Only I and III |
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COLUMN I | COLUMN II | ||
A | P | Bulbil | |
B | Q | Rhizome | |
C | R | Offset | |
D | S | Adventitious buds |
A | B | C | D | |
1. | Q | P | S | R |
2. | P | Q | R | S |
3. | P | Q | S | R |
4. | Q | P | R | S |
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Statement I: | Fragmentation in Hydra is an example of asexual mode of reproduction. |
Statement II: | The body of Hydra breaks into distinct pieces [fragments] and each fragment grows into an adult capable of producing offspring. |
1. | Statement I is correct; Statement II is correct. |
2. | Statement I is incorrect; Statement II is incorrect. |
3. | Statement I is incorrect; Statement II is correct. |
4. | Statement I is correct; 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. |
I. | The unisexual male flower in angiosperms is staminode. |
II. | Heterothallic and dioecious are the terms used to describe unisexual conditions. |
III. | Cucurbits and coconuts are dioecious plants. |
IV. | Papaya and date palm are monoecious plants. |
1. | Only II | 2. | Only III and IV |
3. | Only I and II | 4. | Only I, III, and IV |
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