Ques:Q: A system of glands secretes what chemical messenger molecules into the blood? Choices: - metabolytes - enzymes - acids - hormones A:

Ans:hormones
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Ques:Q: What is the term for an underground layer of rock that is saturated with groundwater? Choices: - delta - river - bason - aquifer A:

Ans:aquifer
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Ques:Q: What is the term for the wavelengths of light humans can see? Choices: - radiation - ultraviolet light - distinct light - visible light A:

Ans:visible light
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Ques:Q: Capillaries in the chorionic villi filter fetal wastes out of the blood and return clean, oxygenated blood to the fetus through what? Choices: - separates vein - Back Vein - skin vein - umbilical vein A:

Ans:
umbilical vein
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