Answer :b) The fatty acid tails from the cold environment would generally be longer but less saturated compared to fatty acids from the warm environment.
Explanation:
this is because the longer and unsaturated the chains are , the more the insulation they provide, in the plasma membrane to maintain relatively constant internal environment in the poikilothermic environment.
Generally, the more unsaturated ( cis/ trans configuration) and longer a carbon -hydrogen chain is in a fatty acid the more the heat energy it will generate.