LIFE SCIENCE

Detailed explanation-1: -Darwin allowed a role for use and disuse as an evolutionary mechanism subsidiary to natural selection, most often in respect of disuse.

Detailed explanation-2: -Lamarckism was proposed by Jean-Baptiste de Monet Lamarck in the year 1744-1829. This theory was based on the principle that all the physical changes occurring in an individual during its lifetime are inherited by its offspring. For eg., the development of an organ when used many times.

Detailed explanation-3: -Use and Disuse He proposed that from years of straining their toes to swim through water, these birds gained elongated, webbed toes to better their swimming. These two examples demonstrate how use could change a trait. By the same token, Lamarck believed that disuse would cause a trait to become reduced.