Question

Which of the following characteristics is not found in Hydra?

• A. Nerve net
• B. Smooth muscles
• C. Digestive system
• D. None of the above

Answer 1

Answer: (B)

Smooth muscles

Hydra is a genus of fresh-water organisms. It belongs to the phylum Cnidaria. It has a nerve net throughout its body. Nerve net is an arrangement of nerves that forms the entire nervous system in many cnidarians. It have a very simple digestive tract. It has a two-way digestive tract, meaning food enters and waste exits through the same opening. It has the gut which is a hollow cavity within the body and has only one opening, the mouth. It does not has a distinct brain or true muscles.

Thus, the correct answer is option B.