A sperm cell moves its flagella back and forth in order to move through its environment. Which statement describes how this eukaryotic cell transfers energy to the flagellum in order to allow it to move? A The cell uses photosynthesis to make the glucose needed to create ATP.
B The cell uses the mitochondria to generate high energy proteins that move the flagella.
C The cell produces ATP in the mitochondria and the high energy bonds are used to move the flagella.
D The cell mitochondria utilize cellular respiration to generate glucose that gives the flagella energy to move.

On a backpacking trip, kenny hikes all day at a steady pace, covering 30 kilometers and burning 4000 calories. at the school track, janelle runs the 100-meter sprint in 13.5 seconds, burning 10 calories. afterward, janelle’s leg muscles are aching and she is breathing hard, while kenny maintains normal breathing all day, even though he burns 400 times more calories than janelle. which two statements offer the best explanation for this phenomenon? a. if the aerobic pathway—cellular respiration—cannot meet the energy demand, then the anaerobic pathway—lactic acid fermentation—starts up, resulting in lactic acid buildup and "oxygen debt." b. aerobic cellular respiration produces more energy, but its use is limited because of lactic acid buildup in the muscles and the resulting "oxygen debt." c. after about 90 seconds of intense exercise, the muscles become depleted of oxygen, and anaerobic respiration can no longer function to produce atp, resulting in "oxygen debt." d. the rate of energy demand determines how the muscles will obtain energy, either from cellular respiration or from lactic acid fermentation if not enough oxygen is present.