Either a. Or d. Cause they can be reversible but !usaly inhabition in enzymes doesnt bind so ide guess a.
Oxygen and sugars/glucose
In geology, a graded bed is one characterized by a systematic change in grain or clast size from one side of the bed to the other. Most commonly this takes the form of normal grading, with coarser sediments at the base, which grade upward into progressively finer onesI just learned about this in our rocks and minerals unit for science,
D. They had to see if this new idea fit the evidence they found in their experiments.