Which of the following is most important to the heartbeat?
a. aortic valve
b. sinoatr...
Biology, 25.08.2019 10:00 lucerogon7403
Which of the following is most important to the heartbeat?
a. aortic valve
b. sinoatrial node
c. lymph node
d. tricuspid valve
Answers: 1
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Give an example of a trait that is controlled by more than one gene.
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What properties of a substance determine how that substance will react when combined with other substances?
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