The second law describes the relationship between force, mass and acceleration; like Force (Newtons) equals Mass Time Acceleration. Newton's first law defines inertial reference frame as that reference frame where an object will move with constant velocity if no forces are acting on point mass.
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Answer:
Because each subject in an experiment has to have equal conditions to ensure the most accurate results. And water temperature is known to impact plant growth. An experiment using different water temperatures is a terribly inaccurate experiment.
RNA: AUGGUACCUUAAUGA
A=U (in RNA only. T in DNA)
C=G (in both DNA and RNA)