Why does a cell membrane have to be made of two layers, rather than just one?

the cell membrane is hydrophobic and will not interact with water phospholipids form a two-layer cell membrane that separates fluid within the cell from the fluid outside of the cell.

science-ocean floors and habitats study guide by volleyballqueen3817 a major advance in ocean-floor mapping. list four sections of the ocean floor. algae that use sunlight to produce their own food through photosynthesis. all of the feeding relationships that exist in a habitat. drying out, predators, find food.

i think its control and coordinate because im pretty sure thats what tissue does and the joints are what control movement and then your skeletal/ bones provides portection. hope that .