Images to promote fitness often lead readers to a certain conclusion about appearance. which of the following is a practice teens most frequently experience?

a. a focus on feeling good about their looks
b. a focus on their appearance
c. a focus on feeling great inside
d. a focus on their health and fitness

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

Which symbols below represent the ions found in the glass of water ? a. oh- and h+ b. co2 and o2 c. o2 and h2 d. nh3- and h+

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope