Which describes the correct order of the geologic time scale, from oldest to most recent?

a. mesozoic era - paleozoic era - precambrian time - cenozoic era

b. cenozoic era - paleozoic era - mesozoic era - precambrian time

c. paleozoic era - precambrian time - mesozoic era - cenozoic era

d. precambrian time - paleozoic era - mesozoic era - cenozoic era

Photosynthesis converts light energy to chemical energy. which molecules are the end product of this transformation of energy in this reaction?

1. environmental factors, such as ph and temperature, can affect the function of an enzyme. a. true b. false 2. which of the following is an organic molecules (ex. vitamins) that an enzyme? a. coenzyme b. product c. active site d. substrate 3. how do enzymes effect the speed of a chemical reaction? a. they speed it up b. they slow it down c. they have no effect on the speed of a reaction 4. during a chemical reaction, an enzyme is used up so that it can only be used one time. a. true b. false 5. which of the following results from a chemical reaction that is catalyzed by an enzymes? a. active site b. product c. substrate d. coenzyme

Lactic acid and energy are produced in muscle cells during choose 1 aerobic respiration cellular respiration anaerobic respiration cellular division