Question

Human tailbone is a vestigial organ. Explain.

Answer 1

The vestigial organ is the remains of a structure that was functional in some ancestors but is no longer functional in the organisms.

In humans, many vestigial structures show a relationship to other mammals including the primates. Ancestors of human were having well-developed tailbone as their adaptation was arboreal. But gradually humans got adapted to the terrestrial habitat. So, their human tailbone is reduced (vestigial).