Ans: Cells are so small because it allows them to have a better surface area to volume ratio. This makes it much easier for the cell to bring in necessary nutreints and excrete wastes. Also the smaller the cell is, the less time it takes to replicate the small cell as opposed to a bigger cell.
Osmosis. If the cell has too much salt the cells will swell. let me know if you want me to explain.
D. POPS.
Your answer is D because pesticides have aldrin, chlordane, .... which are all POPS.
