Answer:
D.
Explanation:
Animal cells have a cleavage furrow which will pinch the cytoplasm into two nearly equal parts. While plant cells have a cell plate that forms halfway between the divided nuclei.
The proteins may assist in the movement of substances by facilitated diffusion or active transport.
Answer:
B. The nervous system signals the muscles of the muscular system to contract and warm the body.
Explanation:
Answer AND Explanation:
By examining fossils, biologists have been able to recreate the evolutionary history of the various organisms that have inhabited the earth. From fossil evidence, scientists have found that the first organisms evolved in the sea at about 3.6 billion years ago. These are unicellular organisms that resembled present day bacteria and blue-green algae.
<span>a.Prenatal stage of a human up to 8 weeks of development after fertilization.
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