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Question
In which animal, nerve cell is present but brain is absent?
In which animal, nerve cell is present but brain is absent?
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Solution
The correct option is D Hydra
Hydra is a small aquatic animal that is found in fresh water ponds, rivers and lakes. The nervous system of hydra consists of nerve cells which are joined and spread in its whole body in the form of a network.
Both earthworm and cockroaches have a brain. Where as sponges are the only multicellular animals without a nervous system.
Hydra is a small aquatic animal that is found in fresh water ponds, rivers and lakes. The nervous system of hydra consists of nerve cells which are joined and spread in its whole body in the form of a network.
Both earthworm and cockroaches have a brain. Where as sponges are the only multicellular animals without a nervous system.
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