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The ability of the heart to vary the degree of its contraction without stretching is called:
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Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems
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All but one describes an effect of aging on the digestive system. a) decreased acid secretion b) decreased elasticity of stomach c) capacity to resist damage decreases d) food remains in stomach for less time
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Vessels draining the myocardium of the heart, open primarily ,into which chamber?
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The ability of the heart to vary the degree of its contraction without stretching is called:...
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