Question

Comment upon any of the following spots
Museum specimen of
HYDRA

Answer 1

Hydra is a solitary, fresh-water organism that has its place in the taxonomy as

Phylum   -----  Coelentrata

Class      -----  Hydrozoa

Order      ----   Hydroidea

Genus     ----   Hydra.

Structure

It is a polypoid, tubular and cylindrical coelenterate measuring growing to a maximum of 1 cm.

The proximal end called basal disc contains the gland cells.

The distal end has the mouth called hypostome which is encircled with slender tentacles.

Feeding - It feeds on insect larvae and crustaceans.

Answer 2

Hydra is basically a solitary, fresh-water organism. Its place in the taxonomy is

Phylum - Coelentrata

Class- Hydrozoa

Order - Hydroidea

Genus - Hydra.

Structure of Hydra: Hydra has two layers on its surface. The layers are separated by mesoglea which is a gel-like substance. The outer layer is the epidermis. The inner layer is called the gastrodermis because it lines the stomach of the hydra. The cells making up these two body layers are relatively simple in structure.