Which of the following affects the speed of a planet's revolution? a. shape of the planet b. gravity of the sun c. temperature of the sun d. atmosphere of the planet

Stem cells found adult tissue such as in bone marrow brain muscle skin and liver are only capable of what

When fossil fuels are burned, carbon dioxide is released. how does this gas impact the environment?

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.