Carie and Heather wanted to know if the size of a coin will affect the number of drops of water it can hold. So they used a dropper to place water on a quarter, nickel, and penny.
What is the independent variable?
number of drops of water
O type of liquid
O size of the dropper
O size of the coin

The independent variable is the size of the coin.

Explanation:

The independent variable is the variable that changes, and it's also the variable that the dependent variable depends on. So depending on the size of the coin,  results in the number of drops of water the coin could hold.

Therefore the independent variable is the size of the coin.

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.

well, you see. the answer to your question is quite simple. the thing that is big, powerful, and over 9,000 is your mom.