Aperson wants to go into business producing aluminum foil and cans. which resource will he most likely need to acquire in large quantities?

bauxite

coal

halite

limestone

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint

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.