What is a substrate? a. a molecule that changes stateb. a place where the reaction occursc. a place on the product where the enzyme fitsd. a reactant that is catalyzed by an enzyme

How many cells are our body made of ? ♡

Select the correct answer. which term do biologists use to describe the average number of individuals of a species per unit area? a. carrying capacity b. population density c. minimal viable population d. survivability curve

Are the earth's ocean floor and continents the same age geologically? why or why not?