| 1. | Mutualism | 2. | Commensalism |
| 3. | Parasitism | 4. | Competition |
| I: | In ecology, the term “niche” describes the role an organism plays in a community. |
| II: | A species’ niche encompasses both the physical and environmental conditions it requires and the interactions it has with other species. |
| 1. | is the primary producer. |
| 2. | has no significant impact on the community. |
| 3. | plays a crucial role in maintaining community structure. |
| 4. | is a rare species that must be preserved immediately. |
| Assertion(A): | The logistic growth model is considered a more realistic one for a population growing under natural conditions. |
| Reason (R): | Resources for growth for most animal populations are finite and become limiting sooner or later. |
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1. |
Both (A) and (R) are True and (R) correctly explains (A). |
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2. |
Both (A) and (R) are True but (R) does not correctly explain (A). |
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3. |
(A) is True; (R) is False |
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4. |
Both (A) and (R) are False |