An apex predator feeding on five different species is experimentally removed. The expected effect on the area will be:
1. | An increase in the number of all the five species |
2. | A decrease in the biodiversity |
3. | One of the five species becomes the apex predator |
4. | All five species die |
Abingdon tortoise got extinct from the Galapagos Islands because of:
1. | pollution caused by frequent visits by humans |
2. | a volcanic eruption causing deposition of lava |
3. | better browsing efficiency of introduced goats outcompeting them |
4. | invasion by a predator from the nearby mainland |
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An endoparasite in the human alimentary canal is expected to possess:
I: | Well-developed locomotion |
II: | A means to protect itself against the digestive juices of humans |
III: | A high reproductive capacity |
1. | Only II | 2. | Only I and II |
3. | Only II and III | 4. | I, II and III |
The distribution of a species is found to expand dramatically when the competitive superior species is removed from the area. This is called as:
1. | Competitive exclusion | 2. | Competitive release |
3. | Interference competition | 4. | Exploitative competition |
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Identify the incorrect statement regarding population interactions:
1. | An orchid growing as an epiphyte on a mango branch is an example of commensalism. |
2. | A given fig species can only be pollinated by its partner wasp. |
3. | Biological pest control methods are largely based on predation. |
4. | Most parasites do not harm or reduce the fitness of their hosts. |
Resource partitioning is:
1. | Competitive exclusion results in the success of the superior species. |
2. | Slight variations in niches allow similar species to coexist. |
3. | Two species can coevolve to share the same niche. |
4. | Differential resource utilization results in a decrease in species diversity |
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Consider the given two statements:
I: | Parasitoidism is the strategy that is closer to predation than parasitism. |
II: | Parasitoids feed on a living host which they eventually kill, typically before it can produce offspring |
1. | Both I and II are correct and II explains I. |
2. | Both I and II are correct but II does not explain I. |
3. | I is correct and II is incorrect. |
4. | Both I and II are incorrect. |
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 |
1. | Mullerian mimicry | 2. | Batesian mimicry |
3. | Aposematism | 4. | Camouflage |
I: | The life cycles of endoparasites are more complex than that of the ectoparasites. |
II: | The morphological and anatomical features of endoparasites are greatly simplified. |
1. | Both I and II are correct and II explains I |
2. | Both I and II are correct but II does not explain I |
3. | I is correct but II is incorrect |
4. | Both I and II are incorrect |