Question

Which of the following cells are present only in the epidermis of Hydra?
(A) Interstitial cells
(B) Cnidoblasts
(C) Sensory cells
(D) Germ cells

• A. B and C
• B. B only
• C. B and D
• D. A, B, C and D

Answer 1

Answer: (C)

Interstitial cells - Totipotent cells which give rise to all different cells of body in epidermis layer of cnidarians
Cnidoblast - Are stinging cells, in epidermis layer of cnidarians cnidoblast in characteristic feature of cnidarians
Sensory cells - Scattered through out epidermis, but sensory cells are also observed in animals of other phyla