Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy. (www.biology.arizona.edu/biochemistry/problem_sets/energy_enzymes.../01t.html)
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A and C
They both can be compared to present or past objects to show how they have changed or evolved over time
Answer: b. Tibia
Explanation:
The answer to this question is the second option