if the pressure of a sample of gas is doubles at constant temperature, what happens to the volume of the gas?

If the pressure doubles, the volume decreases in half.

Explanation:

The relationship between the pressure and the volume of a gas can be explained by Boyle's Law. According to this law, the volume and pressure of the gas has an inversely proprietary relationship. In that case, if the pressure on the volume decreases in the same intensity and if the pressure decreases, the volume increases in the same proportion. In that case, if the pressure of a gas sample doubles, the volume decreases by half.

i think the miocene epoch spans the time from 23 million to 12 million years ago.

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.