Question

Assertion :With increase in population size, environmental resistance tends to increase.
Reason: This is a nature's way to check the expression of biotic potential.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

The inherent maximum capacity of an organism to reproduce or increase in number is termed biotic potential (designated by the symbol 'r). Biotic potential is realized only when the 'environmental conditions are non-limiting, so that natality rate (birth-rate) is maximum and mortality rate (death -rate) is minimum. Under these conditions, population size increases at the maximum rate. However, nature keeps a check on the expression of biotic potential. The environmental check on population size, or its biotic potential is called environmental resistance. With increase in population size, the environmental resistance (against the population) tends to increase.

So, the correct answer is 'Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion'.