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lakkis [162]
3 years ago
8

Which applies to an earthworm but not to a hydra?

Biology
1 answer:
kow [346]3 years ago
3 0
I think the hydra lacks the specialized cells for touch and chemical detection. On the other hand earthworms have touch, light, vibration and chemical receptors along the entire body surface. Both of them are invertebrates (those animals without a backbone), they include insects, worms, jelly fish, spiders among other animals. 
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