Identify the four postulates of natural selection. select all that apply.

survival and reproductive success are variable among individuals in a population.
individuals in a population all possess the same traits.
some trait differences are heritable. individuals with certain traits are more likely to survive and reproduce.
all individuals in a population have equal reproductive success.
individuals in a population vary in the traits they possess.

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.