33) Natural selection could not happen without: a. genetic differences in species b. changes in the environment c. the formation of fossil d. changes in the occurrence of certain trait in a species population
b. changes in environment
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15
What is an isotope?
Answer must include: Same # protons, Different # neutrons, different molecular mass
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20) Determine which graph is showing Exergonic and endergonic reactions. Which is catabolic, which is anabolic?