Question

Consider the following. Assertion (A): The size of a population for any species is not a static parameter. Reason (R): The density of population in a given habitat during a given period fluctuates due to changes in four basic processes.

• A. Both (A) and (R) are correct, (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct, (R) is not the correct explanation of (A)
• C. (A) is correct, but (R) is not correct
• D. (A) is not correct, but (R) is correct

Hint:

Population size changes because of \[ \boxed{ \text{Natality} + \text{Immigration} - \text{Mortality} - \text{Emigration} } \] Hence, population size is always dynamic.

Answer 1

The Correct Option is A

Step 1: Evaluate the assertion. Population size is dynamic and keeps changing with time. Hence, \[ \boxed{\text{Assertion (A) is true}.} \]

Step 2: Evaluate the reason. Population density changes due to four basic processes: \[ \boxed{\text{Natality, Mortality, Immigration and Emigration}.} \] Hence, \[ \boxed{\text{Reason (R) is true}.} \]

Step 3: Relate the assertion and reason. Since these four processes continuously alter population density, population size is not a static parameter. Therefore, \[ \boxed{\text{Reason correctly explains the Assertion}.} \] Hence, \[ \boxed{(A)} \] is the correct answer.