Question

Sensory structures$/$chemoreceptors located in the anterior part of Ascaris are

• A. Amphids
• B. Copulatory bursa
• C. Pineal setae
• D. Pineal spicules

Answer 1

The correct option is A Amphids

The sense organs in Ascaris are as follows: Labial papillae are gustoreceptors and are present on three lips. Cervical papillae are tactile organs. Anal papillae are situated below the posterior end of male. There are 5 pairs of postanal genital papillae and 50 pairs of preanal papillae. They are tactile in function and help in copulation. Amphids, present on each lateroventral lip, are chemoreceptors. Phasmids are chemoreceptors that open one on either side of tail of female.

So, the correct answer is 'Amphids'.