<span>I think the answer is A test cross can be used to: study how traits are inherited. </span>
Answer:
In addition to dinitrogen, other inorganic and organic forms exist in the soil as well. It makes up 78 percent of the atmosphere but <u>cannot be used by plants. </u>It is taken into the soil by bacteria, some algae, lightning, and other means.
Explanation:
B cover the cut with a clean dressing and apply pressure.
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