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After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?
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When analyzing tree rings, what do scientists assume a thin ring indicates?
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Drag each tile to the correct box. the body monitors the levels of oxygen in the blood to regulate breathing. isabel is running in a marathon and is near the finish line. she feels out of breath. how will her nervous system work to generate a reaction? arrange the tiles in chronological order. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.
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How does meiosis brings about genetic variation?...
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