Question

In Hydra, waste material of food digestion and nitroenous waste material are removed from:

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

Answer 1

The correct option is C Mouth and body wall

Hydra being a coelenterate has blind sac body plan. It has only one mouth which serves as the opening for ingestion and waste elimination besides diffusion across body wall.