Which animal possesses neurons but lacks a br | vedclass

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(D) The $Hydra$ belongs to the phylum $Cnidaria$ (or $Coelenterata$).These organisms exhibit a primitive level of organization where they possess a ne

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Hydra

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(D) The $Hydra$ belongs to the phylum $Cnidaria$ (or $Coelenterata$).These organisms exhibit a primitive level of organization where they possess a nerve net consisting of neurons that allow them to respond to stimuli.However, they lack a centralized nervous system or a brain, which is a characteristic feature of higher animals.Sponges $(Porifera)$ lack neurons entirely, while earthworms $(Annelida)$ and cockroaches $(Arthropoda)$ possess a well-developed central nervous system with a brain or cerebral ganglia.

Which animal possesses neurons but lacks a brain?

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