Answer:
4 mass extinctions
Explanation:
as there are huge drops in the graphs
at 440,390,260,50
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Answer:
C. Hypothesis
Explanation:
Hypothesis is a proposed explanation for a certain occurrence and when the explanation is conclusive, then it becomes a theory.
Que Es eso? Porque yo no se
Answer:
Exercise causes the heart to pump blood into the circulation more efficiently as a result of more forceful and efficient myocardial contractions, increased perfusion of tissues and organs with blood, and increased oxygen delivery.
Explanation:
Cardiac output, specifically by a left or right ventricle in one minute.
