Answer:
Rudolf Virchow's most widely known scientific contribution is the cell theory, which built on the work of Theodor Schwann. He was one of the first to accept the work of Robert Remak, who showed the origins of cells was the division of pre-existing cells.
Explanation:
Hope this helps :)
Answer: A. Speed
Explanation: Hope it Helps!
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.
I believe the answer is B. Hope I help! Sorry if not. ):)
