In which animal is nerve cell present but brain absent

In Which Animal Is Nerve Cell Present But Brain Absent Biology Question

In which animal is nerve cell present but brain absent?

Options

(a) Sponge
(b) Earthworm
(c) Cockroach
(d) Hydra

Correct Answer:

Hydra

Explanation:

A primitive type of nervous system,without brain is found in the form of intra epidernal nerve net.However,there is no brain in Hydra to coordinate the response.

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Topics: Neural Control and Chemical Coordination (195)
Subject: Biology (4253)

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