Non point is pollution from many locations and pinpoint is pollution from one source and easy to track
I think it isn't right to claim that an attribute developed so the species included can survive better, qualities advance since people with that characteristic survive better and duplicate more.
I hope the answer will help you.
Answer;
B is the product of enzyme 1 and the substrate for enzyme 2.
Explanation;
-Enzymes are very efficient catalysts for biochemical reactions. They speed up reactions by providing an alternative reaction pathway of lower activation energy.
-The molecules upon which enzymes may act are called substrates and the enzyme converts the substrates into different molecules known as products.
The correct answer would be D.