Question

Which of the following is not present in the body wall of Hydra?

• A. Sensory cell
• B. Glial cell
• C. Cnidoblasts
• D. Nerve cell

Answer 1

Answer: (B)

Glial cell

The microscopic structure of the body wall of Hydra elaborates the presence of two body layers ectoderm and endoderm. Cnidoblasts and the sensory cells are present in the ectoderm. The nervous system of Hydra is less evolved and consists of touch sensitive nerve cells located in the body wall and tentacles of Hydra. Due to the absence of a less evolved nervous system, glial cells are absent in the Hydra.