Flatworms and roundworms both a. have a coelom. b. are symmetrical. c. can be parasitic. d. live in intestines.

Which term describes a normal value for something in the body? a. homeostasis b. set point c. feedback loop d. integration center

What does this experimental investigation lack

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.