What is a substrate?

a. a molecule that changes state
b. a place where the reaction occurs
c. a place on the product where the enzyme fits
d. a reactant that is catalyzed by an enzyme

B and D

Explanation:

In chemistry, a subtrate is said to be place or surface where chemical reaction takes place. But in biochemistry, a subtrate means a substance which an enzyme binds to, to catalyse its transformation into a slecific product or product. So a substrate has different meanings depending on the field of study.

1. desertification

2. captive breeding

3. black rhinoceros

4. renewable resources

explanation:

mark brainliest!

i think that d. wind is the answer.   i missed the question when i answered a. currents.