Unsaturated and saturated lipids exhibit different characteristics based on their structures. which characteristic is unique to saturated fats? forms covalent, carbon-to-carbon bonds is a liquid at room temperature contains the maximum number of hydrogen atoms consists of fatty acids and a carboxyl group

The answer is: contains the maximum number of hydrogen atoms.

All lipids consist of fatty acids which contain carboxyl groups (so, choice d. is eliminated). But what makes saturated fats unique is the maximum number of hydrogen atoms. These hydrogen atoms are bonded by Van Der Waals interaction (so, choice a. is eliminated) and therefore saturated fats are solid at room temperature (so, choice b. is eliminated).

Iam not sure but to me it with be a or dsorry if i was late! hope this ! : )if you really want me to find out the answer that is correct tell me and i will do more research but the a or d makes sense to me.