Question

In the context of organic evolution, the loss of limbs in snakes is explained by the phenomenon of

(a) use and disuse of organs

(b) adaptation to living in burrows

(c) natural selection

(d) inheritance of acquired characters

Answer 1

(a) In organic evolution, Lamarck believed that any particular part of the body that is put into more frequent use, has tendency to develop stronger and better while that part of body which is put into less or no use has tendency to gradually disappear. So, loss of limbs in snake is an example of use and disuse of organs.