Advertisements
Advertisements
प्रश्न
Apart from being a part of the food chain, predators play other important roles. Mention any two such roles supported by examples.
Advertisements
उत्तर
Predators play an important role in:
1.Maintaining the prey population; this regulates intra-species competition. This also helps in checking any overgrazing by herbivores, which might ultimately lead to an unbalanced ecosystem. For example, if tigers are removed from a forest, spotted deer will multiply rapidly. This would result in rapid destruction of herbs and grasses in the forest and ultimately the whole forest.
2. Indicating ecological disturbances. Usually predators are small in number and highly sensitive to ecological changes, owing to their excessive adaptation. For example, Gharials are extremely adapted to their freshwater habitat. They start dying rapidly and in large numbers as soon as a river starts getting polluted, thus indicating ecological disturbances.
APPEARS IN
संबंधित प्रश्न
Select the statement which explains best parasitism.
How is mutualism different from commensalism?
Competition and Mutualism.
The number of deaths under ideal conditions is known as ______.
How absolute Natality differs from Realized Natality
The relationship between sucker fish and shark is _________.
Parasitism can be conectly represented as ____________.
In a pond, we see plants which are free-floating; rooted–submerged; rooted emergent; rooted with floating leaves; Write the type of plant against the following examples.
| Plant Name | Type | |
| a. | Hydrilla | ______ |
| b. | Typha | ______ |
| c. | Nymphaea | ______ |
| d. | Lemna | ______ |
| e. | Vallisneria | ______ |
Statement I: Gause’s competitive exclusion principle states that two closely related species competing for different resources cannot exist indefinitely.
Statement II: According to Gause’s principle, during competition, the inferior will be eliminated. This may be true if resources are limiting.
In the light of the above statements, choose the correct answer from the options given below:
Statement I - Calotropis growing in abandoned fields is never consumed by cattle and goats.
Statement II - Calotropis produces highly poisonous cardiac glycosides.
In light of above statements, select the most appropriate answer from the option given below.
