Q: Peroxisomes perform a couple of different functions, including lipid metabolism and chemical detoxification. in contrast to the digestive enzymes found in lysosomes, the enzymes within peroxisomes serve to transfer hydrogen atoms from various molecules to oxygen, producing what? Choices: - calcium - water - hydrogen - hydrogen peroxide A:
hydrogen peroxide
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Q: Bone marrow, the thymus gland, the spleen, and the tonsils are organs in what body system? Choices: - skeletal system - nervous system - reproductive system - immune system A:
immune system
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Q: What do you call egg-shaped galaxies, which are reddish to yellowish in color because they contain mostly old stars? Choices: - conical galaxies - irregular galaxies - spiral galaxies - elliptical galaxies A:
elliptical galaxies
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Q: What are microscopic vessels with very thin, porous walls? Choices: - veins - arteries - valves - capillaries A:
capillaries
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