Check all the following that are digestive functions of hydrochloric acid. Breakdown of connective tissue in meat. Raising the pH of the stomach content destruction of some ingested micro organisms in food. Activation of the enzyme pepsin

Explanation:

Hydrochloric acid has following digestive functions:

i) Hydrochloric acid causes  activation of the enzyme pepsin.

ii)  Hydrochloric acid also cause  breakdown of connective tissue in meat.

iii)  Hydrochloric acid causes destruction of some ingested microorganisms.

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.

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.