Answer: C. Inheritance of acquired characteristics.
Biological evolution refers to the mechanism of slow and steady change in the characteristics of organisms. This takes place over a period of many generations. The primary factors responsible for biological evolution are natural selection, genetic drift, and mutation.
Acquired characteristics are those changes in an organism which occur due to environmental influences. This makes the organisms adapt to the changing environmental conditions.
Inheritance of acquired characteristics means certain characters are passed from one generation to the next generation. This does not result in any change in the population. Thus, the inheritance of acquired characteristics is not a mechanism for biological evolution.
