Experimental research focuses on explaining why various phenomena happen.
Explanation: Experimental research refers to a scientific approach research in which a variable can be manipulated by a researcher and other variables can be measured, calculated and compared. In experimental research, one or more variables are manipulated to determine their effect on a dependent variable. Experimental research is completed in a controlled environment and the researcher who collects data and results will either support or reject the hypothesis.
It supplies the energy needed for moving molecules through membranes. (Mitochondria convert glucose to ATP, the primary molecule of energy transfer for cells.)