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.
Answer:
where is option I can't see
Answer:
plasmid or it can be the telomere im
pretty sure.
Explanation:
but the reason its not nucleous is there is no nucleous in a prokaryoic cell cause it lacks nuclei.
When the food hits our tongues it triggered saliva (chemical digestion) then our mouths chewing is mechanical. So therefor your answer is The Mouth. Hope this helps <3
