Final answer:
Lipids are the class of organic compounds that possess no double bonds between carbon atoms and are more tightly packed together. They serve as energy storage molecules, structural components in cell membranes, and signaling molecules.
Step-by-step explanation:
The class of organic compounds that possess no double bonds between carbon atoms and are more tightly packed together are called lipids. Lipids are a diverse group of molecules that includes fats, waxes, and oils. They are hydrophobic and serve as energy storage molecules, structural components in cell membranes, and signaling molecules.