Which among the following is an example of atavistic structures?

مندرجہ ذیل میں سے کون سا ایٹاوسٹک ڈھانچے کی مثال ہے؟

Vermiform appendix

Nictitating membrane

Appearance of tail in humans

None of these

Answer: Appearance of tail in humans

Atavistic structures are ancestral traits that reappear after being absent for generations, such as the rare appearance of a tail in humans.

This is considered a reversion to an ancestral form, as human ancestors had tails.