This figure is a graph. The y-axis is labeled "reaction rate," while the x-axis is labeled "PH." The x-axis ranges from 0 to 14. The plot line is U-shaped, beginning approximately three quarters of the way up the y-axis and gradually dipping down to its low point at a PH of 6. The plot line then gradually rises again to its highest point at a PH of 12. It then dips back down to about three quarters of the way up the y-axis at a PH of 14. Image Courtesy of 3DScience. com The graph above shows the progress of an enzyme-catalyzed chemical reaction. Based on the graph, this enzyme is minimally active between pH 5-7 works optimally between pH 5-7 is minimally between pH 0-3 works optimally between pH 0-3

Scenario 5 1) take 10 red and 10 black beans and place them, mixed, on the table. record the starting phenotype # and frequencies (% of your total population) of your starting population in the table provided (generation 0). 2) act as a predator. “capture” as many organisms as you can until you have reduced the population to three organisms. put them aside. at this point, the predators die. 3) the remaining organisms each produce 2 clonal offspring. multiply your organisms accordingly and allow them to mix on the table. calculate and record the resultant phenotype # and frequencies (% of your total population) of your population in the table provided (generation 1). 4) repeat the reproduction event, allowing each of your organisms to produce 2 clonal offspring. calculate and record the resultant phenotype # and frequencies (% of your total population) of your population in the table provided (generation 2). 5) repeat the reproduction event, allowing each of your organisms to produce 2 clonal offspring. calculate and record the resultant phenotype # and frequencies (% of your total population) of your population in the table provided (generation 3).

Sediment layers stop lateral spreading when: they encounter a barrier they encounter an opposing current they run out of additional sedimentary material

Food webs - transferring energy and matter from one level to another. here you see four food webs. one or more are incorrect. which food web(s) show the correct sequence of organisms, from start to top level consumer? a) a b) d c) c d) a and d