Why does changing the ph of a solution affect the ability of an enzyme to catalyze a chemical reaction

What are some characteristics of a free enterprise economy?

Indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. assume all are homozygous. agouti x albino a) 1/2 albino, 1/2 agouti b) all agouti c) 3/4 agouti, 1/4 albino

Explain how organisms could be harmed by high levels of salt from roadways?