Question

In Hydra, waste material of food digestion and nitrogenous waste is removed from

• A. Mouth
• B. Body wall
• C. Mouth and body wall
• D. Mouth and tentacles

Answer 1

The correct option is C Mouth and body wall

In Hydra, undigested residues are egested from coelenteron through the mouth, while nitrogenous excretory product (ammonia) is removed from the general body surface. They lack any organ level organisation, they have a tissue level organisation. They have a gastrovascular cavity which helps in digestion and absorption.

So, the correct answer is option C.