An experiment investigated the speed at which plants absorb magnesium ions from a solution. One plant was treated with a poison that prevents respiration, while the other plant was kept unchanged. The graph displays the outcomes. How are the magnesium ions being taken up by the plants at points N and P?
- Apoint N: active transport; point P: active transport
- Bpoint N: active transport; point P: diffusion
- Cpoint N: diffusion; point P: active transport
- Dpoint N: diffusion; point P: diffusion