the answer is the first one: by producing random changes in an organism's genetic code
Answer: Viruses are infectious agents with both living and nonliving characteristics. Living characteristics of viruses include the ability to reproduce – but only in living host cells – and the ability to mutate.
Explanation:
googles word not mines, but put it in your own.
Answer:
The shape allows the enzyme to bind with a specific substrate.
Explanation:
Substrates and enzymes are like puzzle pieces. They need to be specific shapes to fit together. When they fit together, they do their job wonderfully. If they are pushed together without being the correct shape, they could be damaged.