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 general, competition has the least impact on:
1. | Plants | 2. | Herbivores |
3. | Carnivores | 4. | Both 1 and 2 |
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 |
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 relationship between cattle egret and grazing cattle can be best described as:
1. | Mutualism | 2. | Commensalism |
3. | Parasitism | 4. | Competition |
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 |
What will happen to a well-growing herbaceous plant in the forest if it is transplanted outside the forest in a park?
1. | It will grow normally |
2. | It will grow well because it is planted in the same locality |
3. | It may not survive because of changes in its microclimate |
4. | It grows very well because the plant gets more sunlight |
What parameters are used for the tiger census in our country’s national parks and sanctuaries?
1. | Pug marks only | 2. | Pugmarks and fecal pellets |
3. | Faecal pellets only | 4. | Actual headcounts |
Which of the following would necessarily decrease the density of a population in a given habitat?
1. | Natality> mortality | 2. | Immigration >emigration |
3. | Mortality and emigration | 4. | Natality and immigration |
A protozoan reproduces by binary fission. What will be the number of protozoans in its population after six generations?
1. | 128 | 2. | 24 |
3. | 64 | 4. | 32 |