Which of the following best pairs darwin's contributor to his ideas?

a. lamarck—used a concept of deep time to explain earth's history
b. lyell—stated that geological processes would take millions of years
c. hutton—believed overcrowding led to conditions that would slow population growth
d. malthus—proposed the idea of acquired characteristics during an organism's lifetime

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.