1. Which statement most accurately describes the process of respiration?
   

Select one:

AIt occurs only in plants during the daylight hours and usually involves the exchange of gases.

BIt occurs only in plants during the daylight hours and involves the taking in of preformed organic molecules.

CIt occurs continuously in the cells of all organisms and involves the synthesis of carbohydrate molecules.

DIt occurs continuously in the cells of all organisms and often involves an exchange of gases.