I say it is all of the above.
Cell Membrane pump works to regulate the Sodium and Potassium. The channel will open and allow Sodium in while releasing Potassium.
Atomic mass is determined by the number of protons plus the number of neutrons
The activity of an Enzyme is affected by its environmental
conditions. Changing these alter the rate of reaction caused
by the enzyme. In nature organisms adjust the conditions of their
enzymes to produce an Optimum rate of reaction where necessary
or they may have enzymes which are adapted to function well in
extreme conditions where they live.
Answer: D
Explanation: because the 2 sides on D dont look the same
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