Weegy: Amino acid is to protein as A. fat is to lipid User: During a controlled experiment, a scientist isolates and tests (1 point)a conclusion.
a mass of information.
a control group.
a single variable. Weegy: D. a single variable. Glad I could help. User: Which of the following represents an ion? (1 point)a particle having 14 protons, 14 neutrons, and 14 electrons
a particle having 9 protons, 9 neutrons, and 10 electrons
a particle ... (More)