Question

In Hydra, wastes of food digestion and nitrogenous wastes are removed from

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

Answer 1

The correct option is D Mouth and body wall

Hydra is a freshwater sessile organism belonging to the phylum Cnidaria and class Hydrozoa. They are found in lakes, pond, and stream. Hydra is ammonotelic i.e they secrete ammonia as chief excretory nitrogenous waste. In hydra specialized excretory organs are absent hence in hydra, wastes of food digestion and nitrogenous wastes are removed from mouth and body wall.

So, the correct answer is 'Mouth and body wall'.