Question

A baby has been born with a small tail It is a case exhibiting (a) retrogressive evolution

Answer 1

➠ αɳรωεɾ :-

⟶ Atavism :-

• Atavism is the reappearance of ancestral and not parental characters in an organism, which do not occur normally. For example, tail is absent in man, but occasionally a human baby is born with a short fleshy tail.
• A baby has been born with a small tail. It is the case exhibiting atavism. Atavism is the sudden appearance of some ancestor characters, which are lost during course of evolution.