Based on the graph above, which percentage of the US population held most of the country's wealth between 1983 and 2004? A. the top 20% B. the 2nd 20% C. the 3rd 20% D. the bottom 40% Please select the best answer from the choices provided

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

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

How does an angiosperm prevent self pollination