A second messenger
A. activates protein kinases.
B. serves to amplify the signal.
C. is cyclic AMP.
D. All of these are correct.
Answer: D
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Calcification results in the buildup of dissolved alkaline salts in the B horizon of soils
Indicate whether the statement is true or false
If you were to buy land in order to plant crops, which type of biome would you prefer?
A) savanna
B) prairie
C) tropical forest
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What will be an ideal response?