The diagram below shows a body of water below Earth's surface. To what does the "X" in the diagram refer?

a divide

a floodplain

a watershed

a water table

Describe five factors that influence the value of fuel

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen

The current thought on the structure of the cell membrane is: a. a static phosphate sandwich of lipids b. a fluid-mosaic of phospholipids and proteins c. a bilayer of proteins with static lipid molecules d. an impermeable bilayer of protein molecules e. a static and permeable phospholipid single layer