Answer:
The answer is B, I believe, because it states here that, "Enzymes are highly selective catalysts, meaning that each enzyme only speeds up a specific reaction. ... The molecules that an enzyme works with are called substrates. The substrates bind to a region on the enzyme called the active site. There are two theories explaining the enzyme-substrate interaction."
D both alleles is the answer
<span>The vascular tissues in plants are composed of Xylem and Phloem.These tissues allow nutrients and water to be transported in theother parts of the plant.</span>
