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Q5: Constriction of the pupil of the eye
Q7: A goiter is an enlarged form of
Q18: The best way to reclaim an ecosystem
Q19: The size of a muscle can be
Q41: The greatest concentration of nitrogen on Earth
Q59: _ tissue allows the body to detect
Q65: Endocrine glands and neurons receive signals from
Q66: One advantage of the three-chambered heart over
Q71: The driving force for blood circulation is
Q72: In vertebrates, the main function of the