Do population density studies take into effect water bodies for terrestrial organisms? Why do you think this might cause mistakes in calculations?

yes its like the dead sea which is full of salt which makes you stay afloat

so yes an egg will float in salt

every el niño cycle is different. every year.

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.