Fossils of organisms that are different than today's organisms and are found in deeper rock layers indicates that A.
evolution has occurred
B.
organisms must have changed over time
C.
evolution occurred faster in the past
D.
Both A and B

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

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.

The reactions that occur in the ribosome, where amino acids are combined to form proteins are anabolic or catabolic?