Question

Assertion :In sigmoid growth curve, population finally stabilizes itself. Reason: Finally, the death rate increases than the birth rate.

• 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. Assertion is incorrect but Reason is correct.

Answer 1

The correct option is C Assertion is correct but Reason is incorrect.

The sigmoid growth curve is a graphical representation of the pattern of growth which shows that population density of an organism increases slowly initially, then increases rapidly but then declines until at zero growth rate, the population finally stabilizes itself.

In sigmoid growth curve, finally, growth rate becomes stable because mortality and natality rates become equal to each other and finally the population shows zero growth rate as birth rate equals death rate. Hence, the correct answer is option C.