I'm going to say since I cannot see the graph i'm guessing that it shows an enzyme at its peak and lowering so i'm going to say the first one 1) There is a specific pH range in which the enzyme effectively lowers the reaction's activation energy
If you don't have atp you would be pluralized <span />
Because boys lungs aren’t as big as a mans lungs I guess lol
I have also given you the skeletal muscle difference ......
For extra knowledge ......
hope it helps u ....then mark me as brainliest