Nitrifying<span> bacteria in the soil convert ammonia into </span>nitrite<span> (NO</span>2-) and then into nitrate<span> (NO</span>3-<span>). This process is called nitrification. </span>
Movement of particles from a region of a high concentration to a region of low concentration
Flatworm get most of their oxygen through diffusion.
Answer:
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Explanation:
During the third trimester, the fetus continues to grow in size and weight. The lungs are still maturing. The fetus starts to position itself head-down. By the end of the third trimester, the fetus is about 19 to 21 inches long and weighs about 6 to 9 pounds.
