Q. No.Identify the correct statements:
I.
Ramdeo Misra is revered as the Father of Ecology in India.
II.
Ecology studies the interactions among organisms and between the organism and its physical [abiotic] environment.
III.
The study of Ecology begins at cellular biological organisation level.
IV.
Ecology at the organism level is essentially physiological ecology.
1. Only I and II 2. All except III 3. Only II, III and III 4. I, II, III and IV
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| Assertion (A): | Population ecology links ecology to population genetics and evolution. |
| Reason (R): | It is at the population level that natural selection operates to evolve the desired traits. |
| 1. | Both (A) and (R) are true and (R) explains (A). |
| 2. | Both (A) and (R) are true but (R) does not explain (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
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| I. | The ecological role of the banyan tree in this community is negligible when compared to that of carrot grass. |
| II. | In this community, the percent cover or biomass is a more meaningful measure of the population size. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
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| Assertion (A): | The number of fish caught per trap is not a good measure of its total population density in the lake. |
| Reason (R): | For ecological investigations, it is obligatory to count every individual in a population to estimate population density. |
| 1. | Both (A) and (R) are true but (R) does not explain (A). |
| 2. | Both (A) and (R) are false. |
| 3. | Both (A) and (R) are true and (R) explains (A). |
| 4. | (A) is true but (R) is false. |
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| I. | Nt+1 = Nt + [(B+I) – (D+E)] |
| II. | B is a measure of Natality and D is a measure of Mortality |
| III. | If (B+I) is less than (D+E), the population density will increase |
| 1. | Only I and II are correct | 2. | Only I and III are correct |
| 3. | Only II and III are correct | 4. | I, II and III are correct |
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| I | B | D | E | |
| 1. | Emigration | Natality | Mortality | Immigration |
| 2. | Emigration | Mortality | Natality | Immigration |
| 3. | Immigration | Natality | Mortality | Emigration |
| 4. | Immigration | Mortality | Natality | Emigration |
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| Assertion (A): | The logistic growth model is more realistic for most animal populations in nature. |
| Reason (R): | Resources for growth for most animal populations are finite and become limiting sooner or later in the nature. |
| 1. | (A) is True but (R) is False. |
| 2. | Both (A) and (R) are True and (R) correctly explains (A). |
| 3. | (A) is False but (R) is True. |
| 4. | Both (A) and (R) are True but (R) does not explain (A). |
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| I: | Pacific salmon and bamboo breed many times during their lifetimes. |
| II: | Birds and mammals breed many times during their lifetimes and produce a small number of large-sized offspring. |
| III: | Oysters and pelagic fishes produce a large number of small-sized offspring. |
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
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| 1. | Cryptic colouration | 2. | Aposematic colouration |
| 3. | Batesian mimicry | 4. | Mullerian mimicry |
The result showed that Chthamalus spread into the region formerly occupied by Balanus.
The correct conclusion will be:
| 1. | Interspecific competition makes the realized niche of Chthamalus much larger than its fundamental niche. |
| 2. | Interspecific competition makes the realized niche of Chthamalus much smaller than its fundamental niche. |
| 3. | Interspecific competition makes the realized niche of Balanus much larger than its fundamental niche. |
| 4. | Interspecific competition makes the realized niche of Balanus much smaller than its fundamental niche. |
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