Q. No.What percent of animals cannot maintain a constant internal environment?
1. 1 %
2. 25 %
3. 45 %
4. 99 %
1. 1 %
2. 25 %
3. 45 %
4. 99 %
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. |
Keoladeo National Park, host to migratory birds from Siberia, is in:
| 1. | Rajasthan | 2. | Uttar Pradesh |
| 3. | Madhya Pradesh | 4. | Gujarat |
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 |
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 |
Any attribute of the organism that enables the organism to survive and reproduce in its habitat is called as:
1. Adaptation
2. Phenotypic plasticity
3. Acclimatization
4. Norm of the reaction
All the following are adaptations in desert plants to minimize water loss except:
1. Thick cuticle
2. photosynthesis
3. CAM pathway
4. Sunken stomata
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 |
A thick layer of fat, blubber, beneath the skin is found in:
1. Terrestrial mammals of colder climates
2. Aquatic mammals of colder climates
3. Terrestrial mammals of warmer climates
4. Aquatic mammals of warmer climates
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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