13.Explain the occurrence of vestigial organs on the basis of Lamarck’s theory of use and disuse
13.Explain the occurrence of vestigial organs on the basis of Lamarck’s theory of use and disuse

Solution:-

Vestigial organs are the remnants of options that served necessary functions within the organism’s ancestors. In man, there are over 100 rudimentary organs. A number of them are given below:

 (a) Wisdom teeth:- Wisdom teeth are the last molars on all sides of each the jaws. The Wisdom teeth are supposed as they seem last at an age of concerning 17-20 years

. (b) :- Vermiform appendix comes from the blind finish of the cecum as a slim worm-like tube. it’s a functionless organ in humans, however its corresponding organ in herbivores mammals is kind of useful in digesting polysaccharide.

 (c) Pinna:- Pinna is that the sticking lobe-like a part of the outer ear that merely provides a passage from AN external auditory canal resulting in the membrane. we have a tendency to cannot move the pinna along the sound waves that are its main perform in alternative mammals.