Step-by-step explanation:
6.Saturated fatty acids do not contain double bonds(only single bonds) .Unsaturated fatty acids contain one or more double bonds.
7.There are 3 classes of lipid which is triglycerides, steroids and phospholipids.
8.Triglycerides
-Provide insulation that keeps you warm while protecting your internal organs with a layer of padding.
-When you don't burn all the calories you consume, they converted to triglycerides and stored for future use.
Steroids
-It plays a role in cell repair
-It also plays a role in formation of new cells
Phospholipids
-Protecting cells
-Insulating cells