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
Biosphere is:
1. | A component in the ecosystem |
2. | Composed of the plants present in the soil |
3. | Life in the outer space |
4. | Composed of all living organisms present on earth which interact with the physical environment |
The ecological niche is:
1. | The surface area of the ocean |
2. | An ecologically adapted zone |
3. | The physical position and functional role of a species within the community |
4. | Formed of all plants and animals living at the bottom of a lake |