Sponsor Area

Reproduction In Organisms

Question
CBSEENBI12003477

Which of the following evidences does not favour the Lamarckian concept of inheritance of acquired characters

  • Absence of limbs in snakes

  • Melanization in peppered moth

  • Presence of webbed toes in aquatic birds

  • Lack of pigment in cave-dwelling animals

Solution

B.

Melanization in peppered moth

Industrial melanism is an adaptation where the moths living in the industrial areas developed melanin pigments to match their body to the sootcovered surroundings. The phenomenon provides an excellent example of operation of selection in natural conditions.

Industrial melanism, therefore, presents an excellent example of natural selection (proposed by Darwin), but it is not the example of acquired characters proposed by Lamarck. In caves, due to absence of light, the body of the animal lacks pigmentation. e.g. Proteus anguinus