This ensures that the experimenter can be certain that the variable they are testing is what causes a pattern in the data if there is a pattern.
Answer:
c
Explanation:
Definition: The tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes.
The answer is most likely cellular respiration, but it could possibly be photosynthesis.
Because the sun heats up the sand causing the atoms to move much faster than at night
It should just be the cell membrane, which regulates what comes into the cell and what leaves it.
