Question

Intrinsic rate of natural increase is

• A. The sum of birth rates and death rates
• B. The difference between birth rates and death rates
• C. The sum birth rate and immigration
• D. The difference between sum of birth rate and immigration and sum of death rate and emigration

Answer 1

Answer: (B)

The intrinsic rate of natural increase, denoted by 'r' is the difference in the birth rate and death rate. The r-value of the Norway rat is 0.015, and the flour beetle it is 0.12. The r-value helps us in understanding the effects of biotic and abiotic factors on population growth.