Clara wrote the following hypothesis for an experiment about acidophilic bacteria. bacteria cells will stop dividing in a basic (alkaline) environment because of the high ph. which statement is the best way to restate the hypothesis so that it is more specific?
a. growing acidophilic bacteria in some environments will cause the cells to stop dividing because of ph.
b. if the ph of their environment is changed, acidophilic bacterial cell division will be affected.
c. if the environment of acidophilic bacterial cells becomes alkaline, the bacteria will stop dividing.
d. the more alkaline an environment, the less cell division will occur in bacteria.

The correct answer is C

Explanation:

Acidophilic bacteria or acid loving bacteria  are those organisms that thrive in acidic conditions. The pH is usually in the range of 2.0 and below.  Its intracellular pH is mosoty in range of 4.5-5.5. If the external environmental conditions shift from acidic conditions to alkaline, the cell division will stop as bacteria prefer a neutral or somewhat acidic range. It is due to the effect of  Hydrogen ion concentration that alters the catalytic properties of enzymes which halts metabolism.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.