After a storm, water runs off from place like lawns, streets and parking lots. the water carries any chemicals and contaminants that are present there, including oil. how might these sentences be furter combined?

the answer is d.) homologous; have mammary glands

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.