How does the structure of a phospholipid differ from the structure of a fat?

How does the structure of a phospholipid differ from that of a fat? ... phospholipids- instead of a third fatty acid, there is a phosphate group or a grouping of phosphate and nitrogen. which become the polar head of the molecule and can form a bilayer since it has polar and nonpolar sides i just made a whole quizlet with my friend on this check it
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The rate that would change would be the  searching efficiency/attack rate. there are only two other rates in this model: the  growth rate of prey, and the  predator or consumer mortality rate.the  searching efficiency/attack rate is what indicates how effectively can a predator capture its prey whether in the searching process or actual capturing/attacking process.