why the concentration of nitrate ion in the soil had decreased after the farmer grew maize plants in the field?​

to grow the maize plant take nitrate ion (it is essential for the growth of the plant [maize] to grow it takes the nitrate ion basically nitrogen from the soil)

because the maize plant will take in the nitrate and use it to make proteins for growth.

explanation:

on disadvantage of hydroelectric power is the cost. another disadvantage of using hydroelectric power is finding a water source powerful enough to harvest hydroelectric power.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.