Darwin’s theory of pangenesis shows similarity with theory

Darwin’s theory of pangenesis shows similarity with theory of inheritance of acquired characters then what shall be correct according to it?

1. Useful organs become strong and developed while useless organs become extinct. These organs help in struggle for survival
2. Size of organs increase with ageing
3. Development of organs is due to will power
4. There should be come physical basis of inheritance

According to both the views, 'something' is passed from parent to offspring which causes development of specific characters.