Question

During evolution of man, many changes have taken place in his ancestral character. Which one of the following is an unsignificant change?

• A. Change of diet from hard tough fruits and roots into soft food.
• B. Qualitative improvement in the structure of hands skills for making tools.
• C. Disappearance of tail.
• D. Improvement in speech for communication and social behaviour.

Answer 1

The correct option is C Disappearance of tail.

Tail in present day man is a vestigial organ. All chordates including man have a well developed post anal tail. Change in diet brought about changes in dental and facial make up and other anatomical changes and development of voice were important events during evolution of man. Disappearance of tail was a minor anatomical improvement that finally lead to bipedal locomotion and upright posture.