Which best describes how the digestive system compares to the respiratory system?
A. The digestive system removes waste, while the respiratory system breaks down food.
B. The digestive system provides food to cells, while the respiratory system provides oxygen for cells.
C. The digestive system provides oxygen for cells, while the respiratory system provides food to cells.
D. The digestive system moves food through the bloodstream, while the respiratory system removes waste.
Select your answer:
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Enzymes and ATP Structure › Viewproteins that speed up biochemical reactions by lowering the activation energy.
A. Enzymes
B. Carbohydrates
C. Lipids
D. Nucleic acids
Biochemistry/Cells › View
What is unique about carbon and its bonding ability?
A. It can bond with any element because it has 1 valence electron
B. It can only bond with other carbon atoms
C. It can form up to four different bonds because it has 4 valence electrons
D. It can break down bonds in other molecules