(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 will power
(d) There should be some physical basis of inheritance
[CBSE AIPMT 2001]
Correct Option (d) Reason : According to both the views, something is passed from parent to offspring which causes development of specific characters, i.e. all that has been acquired by the organism during its life time is preserved by generation and transmitted to offsprings in form of pangenes is or gemmules.