Q. No.If global warming continues, how would the distributional range of some species be affected?
1. There will be a poleward shift
2. There will be an equatorial shift
3. No change is expected for any species
4. There will be shift from land to marine water
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| I. | Its characteristics determine, to a large extent, the vegetation in any area. |
| II. | In the aquatic environment, the sediment characteristics often determine the type of benthic animals that can thrive there. |
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
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| 1. | Hemostasis | 2. | Homeostasis |
| 3. | Thermoregulation | 4. | Osmoregulation |
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| Assertion (A): | Ability to maintain a constant internal environment enhances the overall ‘fitness’ of the species. |
| Reason (R): | A constant internal environment permits all biochemical reactions and physiological functions to proceed with maximal efficiency. |
| 1. | (A) is true but (R) is false. |
| 2. | (A) is false but (R) is true. |
| 3. | Both (A) and (R) are true and (R) explains (A). |
| 4. | Both (A) and (R) are true but (R) does not explain (A). |
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Thermoregulation and osmoregulation can be achieved by all:
1. Amniotes
2. Birds and mammals
3. Vertebrates
4. Chordates and insects
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In the following representation of organism response to abiotic factors, the conformers are shown by the letter:
1. A
2. B
3. C
4. Both B and C
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When exposed to cold temperatures, which of the following is responsible for maintaining constant body temperature in humans?
1. Vasoconstriction and shivering
2. Vasodilation and shivering
3. Vasodilation and sweating
4. Vasoconstriction and sweating
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What percent of animals cannot maintain a constant internal environment?
1. 1 %
2. 25 %
3. 45 %
4. 99 %
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| Assertion (A): | An overwhelming majority of animals and nearly all plants cannot maintain a constant internal environment. |
| Reason (R): | These animals and plants are simply conformers. |
| 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. | Both (A) and (R) are false. |
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Very small animals are rarely found in polar regions because:
| 1. | Being smaller in size makes them highly vulnerable to predation. |
| 2. | They have a larger surface area relative to their volume. |
| 3. | Small size makes long distance migration difficult. |
| 4. | Small sized animals lack insulating body layers. |
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