Question

Animals have a variety of adaptations, including trachea and gills, which allow this key process to occur. Which provides the molecules necessary for cellular respiration and efficient ATP synthesis?
A. Waste elimination
B. Gas exchange
C. Digestion
D. Nutrient absorption

Answer 1

Answer:

B:

GAS EXCHANGES

Explanation:

Answer 2

Answer:

B

Explanation:

Gas exchange provides oxygen that is required for aerobic cellular respiration. Aerobic respiration produces more ATP molecules than anaerobic respiration. This is because oxygen acts as the ultimate proton acceptor (in the Krebs/Citric cycle) in the matrix of the mitochondria to form water as the waste product. This allows a proton motive force to be created in the mitochondria that is harnessed by ATP synthase to produce ATP molecules.