Final answer:
A lipid is an organic compound such as fat or oil. They are not soluble in water but are freely soluble in organic solvents. There are two types of fatty acids: saturated and unsaturated.
Step-by-step explanation:
A lipid is an organic compound such as fat or oil. Lipids are not soluble in water but are freely soluble in organic solvents. They consist of repeating units called fatty acids, which have the general formula CH3(CHâ‚‚) COOH. There are two types of fatty acids: saturated fatty acids and unsaturated fatty acids. Blood types can be distinguished based on the presence or absence of different lipids found on the surface of red blood cells.