Question

Hydra and planaria have different body oraganization or different nervous system

Answer 1

Answer:

Hydra Has a Simple Nervous System. Hydra possesses one of the anatomically simplest nervous systems — a diffuse nerve net spread throughout the body with no signs of centralization. It is made up of about 6.000 nerve cells belonging to two morphological types — sensory and ganglion neurons.

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Answer 2

Explanation:

Answer: Hydra Has a Simple Nervous System. Hydra possesses one of the anatomically simplest nervous systems — a diffuse nerve net spread throughout the body with no signs of centralization. It is made up of about 6.000 nerve cells belonging to two morphological types — sensory and ganglion neurons.