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Q. No.Semelparity is a reproductive strategy also known as "big bang" reproduction. This is because the single reproductive event of semelparous organisms is usually large as well as fatal. A classical example is seen in:
1. Most perennial plants
2. Mollusks
3. Pacific salmon
4. Humans
Subtopic: Life History Variations |
72%
Level 2: 60%+
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The mean annual precipitation is the most variable in:
1. Tropical forest
2. Desert
3. Grassland
4. Arctic tundra
1. Tropical forest
2. Desert
3. Grassland
4. Arctic tundra
Subtopic: Introduction to Ecology | Organisms and its Environment |
74%
Level 2: 60%+
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Consider the given statements:
1. Only II and III are correct
2. Only I is correct
3. Only I and III are correct
4. Only III is correct
| I. | Temperature is the most important ecologically relevant environmental factor. |
| II. | Animals living in aquatic environment do not face any water-related problems. |
| III. | Photoperiod has no effect on animal reproduction. |
1. Only II and III are correct
2. Only I is correct
3. Only I and III are correct
4. Only III is correct
Subtopic: Major Abiotic Factors |
79%
Level 2: 60%+
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If the core body temperature of a human body goes below 37 oC, the feedback mechanism elicited to bring the temperature back to normal will include:
1. Vasoconstriction and sweating
2. Vasodilation and sweating
3. Vasoconstriction and shivering
4. Vasodilation and shivering
1. Vasoconstriction and sweating
2. Vasodilation and sweating
3. Vasoconstriction and shivering
4. Vasodilation and shivering
67%
Level 2: 60%+
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Very small animals are rarely found in polar regions mainly because:
| 1. | There is an abundance of large predators in the polar regions |
| 2. | Very small animals are generally herbivores, and grasses do not grow in polar regions |
| 3. | The water is found only beneath the frozen ice in polar regions |
| 4. | They have a larger surface area relative to their volume |
89%
Level 1: 80%+
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Match each item in column I with one in column II and select the correct match from the codes given:
Codes:
| Column I | Column II | ||
| A | Hibernation | P | Bears in winter months |
| B | Aestivation | Q | Air-breathing land snails |
| C | Diapause | R | Zooplankton in lakes and ponds |
| A | B | C | |
| 1. | P | Q | R |
| 2. | Q | P | R |
| 3. | P | R | Q |
| 4. | R | Q | P |
87%
Level 1: 80%+
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Kangaroo rat:
| I: | has a marsupium to nurse the young ones |
| II: | obtain enough water from the metabolic oxidation of the seeds they eat to survive and do not need to drink water at all |
| 1. | Only I is correct |
| 2. | Only II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect |
Subtopic: Organisms and its Environment |
Level 3: 35%-60%
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Given below are two population pyramids, both of India, one for year 2000 and another for year 2020:
| 1. | Pyramid A is of 2020 as it has a broader base |
| 2. | Pyramid B is of 2000 as it has more females in the younger age groups |
| 3. | Pyramid B is of 2020 as it has more females in the younger age groups |
| 4. | Pyramid A is of 2000 as it has a broader base |
Subtopic: Population Attributes |
53%
Level 3: 35%-60%
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The population of Ukraine today is most likely to be affected by:
| 1. | Natality | 2. | Mortality |
| 3. | Immigration | 4. | Emigration |
Subtopic: Population Characters: Age Structure & Migration |
59%
Level 3: 35%-60%
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Predators:
| 1. | act as conduits for energy transfer across trophic levels |
| 2. | do not include herbivores in broad ecological context |
| 3. | indiscriminately kill their prey |
| 4. | have a very high biotic potential |
Subtopic: Population Interactions: Predation |
89%
Level 1: 80%+
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