Species diversity decreases as we move away from the equator towards the poles. What could be the possible reasons?

These questions consist of two statement each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses. A. If both Assertion and Reason are true and Reason is a correct explanation of the Assertion. B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion. C. If Assertion is true but Reason is false. D. If both Assertion and Reason are false. Assertion: With few exception, tropics more species than temperature or polar areas. Reason: Species diversity decrease as we move away from the equator towards the poles.

These questions consist of two statements each, printed as Assertion and Reason. While answering these questions,you are requied to choose any one of the following four responses If both Assertion and Reason are true and Reason is a correct explanation of the assertion If both Assertion and REason are true but Reason is not a correct explanation of the Assertion If Assertion is true but Reason is false If both Assertion and Reason is false. Assertion:With few exceptions, tropics harbour more species than temperature or polar areas Reason: Species diversity decreaes as we move away from the equator towards the poles.

The biodiversity increases when one moves from the pioneer to the climax stage. What could be the explanation?

How does dip angle change when one moves from magnetic equator to pole?

The species diversity of plants (22 per cent) is much less than that of Animals (72 per cent). What could be the explanations to how animals achieved greater diversification?