In which animal is nerve cell present but brain absent

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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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