When the feeding efficiency of one species is reduced due to the inhibitory presence of the other species, even if resources are abundant, it is called:
1. | Interference competition | 2. | Exploitative competition |
3. | Amensalism | 4. | Predation |
In Connell’s experiment:
1. | Balanus excluded Chathamalus from the intertidal area. |
2. | Chathamalus excluded Balanus from the intertidal area. |
3. | Balanus is smaller than Chathamalus. |
4. | Both are equally competitive. |
In general, competition has the least impact on:
1. | Plants | 2. | Herbivores |
3. | Carnivores | 4. | Both 1 and 2 |
MacArthur showed that five closely related species of warblers living on the same tree were able to avoid competition and co-exist due to:
1. | Behavioral differences in their foraging activities. |
2. | Pre-zygotic reproductive isolation mechanisms |
3. | Physiological differences in acclimatization |
4. | Gene differentiation |
Which of the following is not usually an adaptation for a parasitic mode of life?
1. | Loss of unnecessary sense organs |
2. | Presence of adhesive organs or suckers |
3. | Loss of the digestive system |
4. | Low reproductive capacity |
The human liver fluke depends on two intermediate hosts that are:
1. | A crustacean and a fish |
2. | A snail and a fish |
3. | An echinoderm and a fish |
4. | Fishes of two different species |
Flowers and their insect pollinators must undergo co-evolution because:
1. | Without pollinators plants may get extinct |
2. | Plants have to reward the pollinators |
3. | The relationship must be safeguarded against cheaters |
4. | Insects are the major pollinators of plants |
The pollinator of the fig plant:
I: | Uses fruit as an oviposition site |
II: | Uses seeds for nourishing its larvae |
1. | I only | 2. | II only |
3. | Both I and II | 4. | None |
Autecology is the:
1. | Relation of heterogeneous populations to their environment |
2. | Relation of an individual to its environment |
3. | Relation of a community to its environment |
4. | Relation of a biome to its environment |
Ecotone is:
1. A polluted area
2. The bottom of a lake
3. A zone of transition between two communities
4. A zone of developing community