NEET 2001 Biology question

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

(1)Mouth and mouth
(2)Body wall and body wall
(3)Mouth and body wallCorrect
(4)Mouth and tentacles

Answer: (3)

Solution

Hydra has an incomplete digestive system with a single opening, the mouth (hypostome); undigested food is egested through the same opening. It has no excretory organs, and its

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Question ID VK-088853