Q. No.Which of the following algae is likely to be found in the deepest waters?
1.Green
2.Brown
3.Red
4.All are found at equal depths
1.Green
2.Brown
3.Red
4.All are found at equal depths
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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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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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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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In animals, the organism, if unable to migrate, might avoid the stress by escaping in time. All the following would exemplify this except:
| 1. | Hibernation | 2. | Aestivation |
| 3. | Diapause | 4. | Migration |
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Under unfavorable conditions, many zooplankton species in lakes and ponds are known to enter a stage of suspended development called as:
| 1. | Dormancy | 2. | Hibernation |
| 3. | Aestivation | 4. | Diapause |
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All the following are adaptations in desert plants to minimize water loss except:
1. Thick cuticle
2. photosynthesis
3. CAM pathway
4. Sunken stomata
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According to Allen’s rule:
| 1. | Mammals from colder climates generally have shorter appendages |
| 2. | Mammals from colder climates generally have longer appendages |
| 3. | Mammals from colder climates generally have smaller body size |
| 4. | Mammals from colder climates generally have larger body size |
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High altitude acclimatization in humans include all the following except:
| 1. | Increased RBC production |
| 2. | Increased breathing rate |
| 3. | Increased heart rate |
| 4. | Increased binding affinity of haemoglobin |
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Unlike a population, an individual has:
| 1. | Birth and death | 2. | Birth rate |
| 3. | Death rate | 4. | Sex ratio |
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