Choose the correct relationship between concentration of minerals in soil and root cells.
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a
Concentration of minerals in the soil is higher than the concentration of minerals in the root.
b
Concentration of minerals in the soil is usually same as that of the concentration of minerals in the root.
c
Concentration of every mineral in the soil is equal to concentration of that mineral in the root cells.
d
Concentration of minerals in the soil is usually lower than the concentration of minerals in the root.
answer is D.
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Detailed Solution
The concentration of minerals in the soil is usually lower than the concentration of minerals in the root. Therefore, most minerals must enter the root by active absorption into the cytoplasm of epidermal cells. This needs energy in the form of ATP.