Which phrase best describes a process represented in the diagram below? A.) a zygote dividing by mitosis B.) a gamete dividing by mitosis C.) a gamete dividing by meiosis D.) a zygote dividing by meiosis

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.