Answer and Explanation:
Why does enzyme activity plateau as substrate concentration increases?
Simple. The enzyme is saturated, now all available enzyme molecules are busy processing substrates.
B. Gametophytes produce diploid gamers (the gametes are haploid)
Melting because you can physically see it.
Answer:
It is A Pls correct me if I'm wrong
Explanation:
I think it might be the first one: hiv infections. (hope this helps!)