The cell membrane is built of a double layer of .

Phospholipids (Phospholipid bilayer)

Chemically, the plasma membrane (also called the cell membrane) is a double layer of phospholipids (phospholipid bilayer) in which proteins, and sometimes sterols, are embedded.

Can you put the picture?

1) the mayans built pyramids just like the egyptians. the mayans also used hieroglyphics like them.2) power was passed down by family. for example, if the father dies, the son would be the next king.3)they both built pyramids for their structures.4)the main crop for the mayans was maize.5)they also grew manioc, beans,  squash,  amaranth, and chile peppers.