Question

Which of the following organs in a man is not a vestigial?

• A. Vermiform appendix
• B. Nictitating membrane
• C. Ear muscles
• D. Epiglottis

Answer 1

The correct option is D Epiglottis

Vestigial organs are the organs which where functional in the past but not used in the present. Vermiform appendix is the blind tube which connects to the caecum. Although it protects some of good bacteria in the intestine but due to no evidence of its role in the metabolic activity, it is considered as vestigial organ.

Nictating membrane is the third eyelid which is vestigial in humans it helps in the protection of eyes in cats etc.

The external ear muscles that connect the ear to the scalp are considered to be vestigial because they provide full movement of the ear for other mammals but are non functional in humans.

Epiglottis is a flap like structure which regulates the entry of food in oesophagus. So, the correct answer is option D.