Biology
The main result of aerobic respiration is the

Conversion of radiant energy into chemical energy
Production of ATP from the breakdown of glucose
Production of lactic acid as an end product
Storage of energy in a polysaccharide

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Biology
Which of the following is true about veins?

Veins have valves; arteries do not
Veins have a smaller diameter lumen than arteries
Veins are more muscular than arteries
Veins carry blood away from the heart, while arteries carry blood to the heart

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