Ammonia can be converted into plant nutrients by soil bacteria, but it can be toxic to animals. A scientist decides to measure ammonia concentrations in the leaf tissue of two different coniferous forest locations. One location is polluted with runoff from a nearby factory, and one location is not polluted.
Each coniferous forest location contained similar types of plant and animals species. Which of the following best identifies the scientific question that
would guide this scientist's specific investigation?

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

The intervention of extraterrestrials has been used to explain the bermuda triangle, a region of the atlantic ocean where ships and planes are frequently lost, leaving no evidence behind. how would this explanation best be characterized?

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.