during an experiment you make observations to test the hypothesis and prediction
I believe it’s cover crops but i could be wrong hope it helps
<span>A medical researcher can successfully prevent communication between cells by blocking the chemical messengers from traveling to or reaching the target cells. A medical researcher can also prevent the cells from producing the chemical messengers.</span>
That would be A and E.
because u can measure or calculate the variables in these 2 hypotheses. (Amount of protein is diet, muscle mass, salt intake, blood pressure.)
Alternative hypotheses have to be tested to know if they are incorrect or correct. It would be Answer D.
