Which macromolecule predominantly makes up the cell membrane?

Phospholipids are the main component of a cell membrane

Phospholipids for the bilayer of the cell membrane, with their hydrophilic heads pointing to the inside and outside of the cell and the hydrophobic tails pointing inwards:

true, generally referred to as invasive species given that they have no natural predators in new environment

in situ hybridization has been widely used for research applications, including clinical cytogenetics, gene mapping, tumor biology and studies of chromosome evolution.