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1. How does the pulmonary artery and pulmonary vein differ in their function when compared to a normal artery and vein?
a. All the arteries carry oxygenated blood except the pulmonary artery, which carries deoxygenated blood to the lungs.
b. All veins carry oxygenated blood except the pulmonary vein, which carries deoxygenated blood from the lungs to the heart.
2. Transpiration is a necessary evil in plants. Explain.
a. In plants, transpiration is a necessary evil because it is unavoidable but can be damaging.
b. If a plant loses its water, it will wilt and eventually die if it is in a drought.
c. Choose the functions of transpiration:
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