B. To contrast between the high and low concentration of molecules.
for example a solution with a higher solute concentration than the inside of the cell is called hypertonic
C; rolls in mud to cool off and deter flies All the other answers refer to structural (physical) adaptations.
Answer: D
Explanation:
Many unicellular organisms live in bodies of water and must move around to find food. Most often, they must obtain nutrients by eating other organisms. Plant-like protists, and some types of bacteria, can make their own food through photosynthesis.
B. speed up the reuptake of dopamine and norepinephrine
Its the experiment part where you test the hypothesis
