Answer:
Fatty acids have a carboxyl group at one end of a hydrocarbon molecule.
<u>The carbon atoms in saturated fatty acids are linked entirely by single C-C bonds.</u>
Unsaturated fatty acids contain one or more double bonds.
<u>Double bonds cause molecules to bend, and they can pack less tightly.</u>
The answer is Model. Hope this helps!!
What are the species that are labeled a to e?