What role do plankton play in the oxygen cycle? A. They produce oxygen in the forests.
B. They produce oxygen in the ocean.
C. They absorb carbon dioxide in the forests.
D. They release carbon dioxide in the ocean.

What is the name of the two satelites on mars

The chemical form of energy that is useable by the cell to do work

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.