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 |
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 |
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 |
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 |
Consider the given statements:
I: | Very small animals are rarely found in the polar regions. |
II: | Mammals from colder climates have shorter ears and limbs. |
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. |
Consider the given statements:
I: | Among the green, brown and red algae, red algae are expected to be found in the deepest waters. |
II: | The photosynthetic pigment, phycoerythrin, present in them is very efficient in absorbing the red light of PAR. |
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. |
Identify the incorrect statement regarding abiotic factors in ecology:
1. | Temperature is an ecologically relevant factor as it affects enzyme kinetics. |
2. | Even aquatic animals face water-related problems. |
3. | Light is an ecologically relevant factor only for plants. |
4. | Sediment characteristics often determine the type of benthic animals found. |
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. |