An ecosystem a. is a collection of interacting species living in a specific area b. is a regional grouping of plants, animals and other biotic factors c. is a grouping of plants and animals that interacts with one another in a way that causes the grouping to die d. is the total population of a specific kind of plant, animal or microbe and all members of which do or potentially can interbreed and produce young e. encompasses all the organisms and the physical and chemical environment within an area

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

Which group of molecules are targeted by the kinases in order to control this movement

1. an enzyme is considered a(n) because it speeds up a chemical reaction without being used up.2. in a catalyzed reaction, a reactant is often called a(n) . an enzyme is specific because the shape of its matches only particular reactants.4. an enzyme speeds up reactions by lowering the . the between an active site and its substrate often strains bonds and the reaction proceed.6. a( , which is often a vitamin, binds to an enzyme and plays a role in catalysis.7. high temperatures or changes in ph can an enzyme, causing it to lose its shape and biological activity.