The answer is
D. Repeated trials
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All cells require enzymes<span> to survive and </span>function.Enzymes<span> are catalysts, which means that they make chemical reactions go faster, but are not changed by the reaction.</span>
It is distinctive, widespread, abundant and limited in geologic time. Because most fossil<span>-bearing rocks formed in the ocean, the major </span>index fossils<span> are marine organisms. That being said, certain land organisms are useful in young rocks and in specific regions.</span>
Answer:
The correct answer is B. 95;40;7.4
Explanation:
Ranges of these values are:
PCO2: 35-45 mmHg
PO2: 80-100 mmHg
pH: 7.35-7.45
