If Darwin's theory of pangenesis shows similarity with theory of inheritance of acquired character then what shall be correct according to it

Options

A. Useful organs become strong and developed while useless organs become extinct. These organs help in struggle for survival
B. Size of organs increase with ageing
C. Development of organs is due to willpower
D. There should be some physical basis of inheritance

Answer

D

Explanation

Darwin theory of pangenesis proposed that each cell of the body produces small copies called gemmules or pangene. These are transported to testis or ovary where these gemmules are gathered into gametes. These gemmules give rise to new organism. Pangenes or gemmules are transmitted to offspring from their parent as some specific characters are presented during its lifetime by that generation.