In the surface energy budget, - SW represents
A) NET R. B) incoming energy.
C) shortwave reflectance. D) heat.
C
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Some types of bacteria are extremely important in changing atmospheric nitrogen into a form of ____
A)oxygen that is released into the atmosphere B)carbon dioxide that speeds decomposition C)carbon dioxide that aids in plant growth D)soil nitrogen suitable for use by plants E)nitroglycerine for uptake by plant roots
An example of a density-independent factor would be ________
A) a plant parasite, such as mistletoe B) blight (a mold disease) in a wheat field C) cold weather causing a lake to freeze D) suitable nest sites for a flock of warblers E) a specialist searching for the one species of plant that is its food
Why is fiber essential in a healthy diet?
A) It contains essential amino acids. B) It contains essential fatty acids. C) It is necessary for proper functioning of the digestive system. D) All of the above are correct.
At its maximum extent, ice covered almost ________ of the Earth's land surface
A) 1/3 B) 1/5 C) 3/4 D) 1/10 E) 4/5