Will a human being have the same set of cells that he or she is born with when he or she is old

Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content

Compare and contrast your sells take in oxygen, water, and food. what is one waste product that leaves your cells?

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.