Enzymes is a substance that is produced by any living organisms. It acts as a biological catalyst which brings about some specific chemical reactions in the body. All enzymes in the body does not work at the same speed or same rate.
Different enzymes works at different rates. These can be affected by various factors. Different enzymes works at different specific conditions such pH, temperatures, substrate concentration, enzyme concentration, etc.
Had to look for the options and here is my answer. The answer that best fits the blank above is PRINCIPLE OF FOSSIL SUCCESSION. This principle states that fossils appear in an order chronologically in a vertical manner. Hope this answers your question.
