Marcus is studying plant growth. He uses four identical trays of potting soil. He plants 2 marigolds in the first tray, 5 in the second tray, 8 in the third tray, and 15 in the last tray.
Marcus places each of the trays on the same table near a window. Each day he adds an
equal amount of water to the soil in each tray. Once a week for the next month, Marcus
measures the heights of the plants in each tray.

yes? sounds right, but you didn’t ask a question.

im not in connections yet but i might can you some questions. what grade are you in?

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

me and my friend did 2