AP BIOLOGY

Detailed explanation-1: -In this investigation, the independent variable is represented by the different liquids (Option C). The independent variable is the variable that isn’t changed by the other variables during the experimental procedure.

Detailed explanation-2: -When you try to grow plants using another liquid, the molecules (or what makes up that liquid) are shaped differently from water molecules. Because of their different shape, they block the process of photosynthesis from occurring, so the seeds do not know they should grow!

Detailed explanation-3: -Plant height is the dependent variable that responds to the change in the independent variable. Each plant is exposed to an equal amount of sunlight, so sunlight is the control variable. They are also grown in the same sized pot and given an equal amount of water.

Detailed explanation-4: -In a study measuring the influence of different quantities of fertilizer on plant growth, the independent variable would be the amount of fertilizer used. The dependent variable would be the growth in height or mass of the plant.

Detailed explanation-5: -The independent variable is the variable that is deliberately changed by the scientist. The dependent variable is the one observed during the experiment. The dependent variable is the data we collect during the experiment.