poikilotherms organsm are those organsms which are not able to maintain constant body temperature. i mean their body temperature flactuate according to that of environment. example lizard, fish, etc... those organsm it's body lacks mechanism for temperature regulation, a thing which makes poikilotherm to perform some behaviour so that to regulate it's body temperature.. so a question is that, what are the ways/behavior performed by poikilotherm organsms to regulate their body temperature?? any one reply