Question

most lipids do not dissolve in water. lipids contain mostly carbon and hydrogen atoms, which form nonpolar carbon–carbon and carbon–hydrogen chemical bonds. as a result, lipids tend to be nonpolar. nonpolar substances do not mix with water, so lipids tend to be hydrophobic, or water - fearing. this image shows corn oil being poured into water.
blank insoluble in water due to their many blank chemical bonds.
polar

Explanation:

The text explains that lipids (like corn oil) are insoluble in water. Lipids have nonpolar carbon - carbon and carbon - hydrogen bonds. Nonpolar substances don't mix with water (a polar substance), so the blank should be filled with "nonpolar" because the nonpolar nature of these bonds makes lipids hydrophobic and insoluble in water.

Answer:

nonpolar