First slide
Classification of Animals
Question

Read the following statements. 
(a) Mesoglea is present in the body wall of Hydra.
(b) Notochord is an ectodermal rod-like structure.
(c) Sponges reproduce asexually by fragmentation.
(d) Annelids exhibit organ-system level of body organisation.
(e) Roundworms absorb nutrients from the host directly through their body surface.
Choose the correct answer from the options given below.

Moderate
Solution

Hydra is a diploblastic animal with mesoglea between the ectoderm and endoderm of the body wall. Sponges reproduce asexually by fragmentation (also by budding) and sexually by syngamy (fusion of gametes). Annelids exhibit organ-system level of organisation. Notochord is mesodermal. Tapeworms absorb nutrients from the host directly through their body surface.

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