Hydra has no specialized excretory system because:
Correct answer: C. The whole body cells are in contact with water
- A. It does not produce waste material
- B. Due to absence of mesoderm
- C. The whole body cells are in contact with water
- D. It has pseudocoelom.
Explanation
Hydra has no specialised excretory organs because its simple body is surrounded by water and its cells can lose soluble wastes directly by diffusion. The likely mistake is pseudocoelom, but Hydra is a diploblastic animal and does not possess a pseudocoelom.
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