Phospholipids are a group of lipids that are present in the cell membrane. It is the major component of a cell membrane. The structure of a phospholipid cell have both a hydrophobic and a hydrophilic regions in the single molecule. It generally consists of hydrophilic "head" having a phosphate group and two hydrophobic "tails" of fatty acids. They form lipid bilayers as they exhibit amphiphilic characteristic.
In Yellowstone the Pike fish were eating all of the trout causing the bear to eat the deer causing the wolves to not have food and therefor throwing the whole ecosystem out of balance
