Why is potassium deficiency in plants most common on light, sandy soils?
A. plants grown in sandy soil don't require potassium
B. potassium ions are too tightly bound to sand particles to be used by plants
C. roots grown in sandy soil can't absorb potassium
D. percolation of water through sandy soils leaches potassium from the soil
Answer: D
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The function of the kidney is to filtrate and reabsorb the body fluid. Which of the following structures is the filtration apparatus of a kidney?
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Which of the following statements concerning trees is true?
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Since the whole genome sequencing method eliminates the need for constructing physical and genetic maps, this
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