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Author Question: When greenhouses are cooled using a natural ventilation system, chilling injury to plants can occur. ... (Read 27 times) |
Did you know?
A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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There are 20 feet of blood vessels in each square inch of human skin.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.