In order for cells to function properly, the enzymes that they contain must also function properly. The graph below shows how pH affects the activity of the enzyme salivary amylase. From the information given, what can be inferred about cells that have salivary amylase?
A.
They do not function well at a pH that is too high or too low.
B.
They function best at a high pH.
C.
They function equally well regardless of the pH level.
D.
They function best at a low pH.
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Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.