Triacylglycerol and Fatty Acid Questions, biology homework

Is it true to state that all living organisms utilize fatty acids with even number of carbons as part of their triacylglycerols for the purpose of storing energy for a long-term need? Briefly explain why.

Is it true to say that a significant quantity of oleic acid is cleaved off from phospholipid membrane when mammalian cells receive signals (such as interferons) that indicate pathogen attack or tissue damage. Briefly explain why.