21. When muscles are exercised without enough oxygen A. lots of ATP is formed
B. NADPH molecules split
C. lactic acid builds up
D. fermentation stops

Select the correct answer from each drop-down menu. during the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.

What is the period of cell life when it is conducting

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these