Animal cells each have a centrosome and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, whereas animal cells do not.
Answer:
b genes contain the code to make proteins
<span>The biological term for such organisms is "deuterostomes". Those who's first opening is the mouth are called protostomes.
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The third answer, few mussels developed a thicker shell to protect themselves from crabs found in the region. The change of thickness of shells is an evolution to adapt from the crabs and survive. Further explanation can be read on the research conducted by Aaren Freeman and James Byers. It was learned that crabs release chemicals that are detected by mussels. In turn, mussels have a physical reaction triggered by the chemicals which lead to the thickening of their shells.
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The answer to this question is D: Psychoactive. It is the world's most widely consumed psychoactive drug.