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Question
Which one of the following animals possesses nerve cells but no nerves?
Which one of the following animals possesses nerve cells but no nerves?
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Solution
The correct option is B Hydra
Hydra has nerve cells/ganglion cells that are small or elongated having one or more processes. Even though Hydra has a system of cells specialized for sensory responses such as touch and chemical responses it does not have a well developed system of nerves that are connected. Instead it has a system of nerve nets that are spread throughout the body and is a simpler organisation.So, the correct answer is 'Hydra'.
Hydra has nerve cells/ganglion cells that are small or elongated having one or more processes. Even though Hydra has a system of cells specialized for sensory responses such as touch and chemical responses it does not have a well developed system of nerves that are connected. Instead it has a system of nerve nets that are spread throughout the body and is a simpler organisation.
So, the correct answer is 'Hydra'.
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