B.An ectotherm is also a poikilotherm and is bradymetabolic . Endotherms , not exactly homeotherms , and not always tachymetabolic . They lower their metabolism at night or when food is not available. The limbs will then cool down in 15 minutes, but the body can take 7 or more hours to cool down. Many reptiles can and do do this.
Monitor lizards are very slightly endothermic .
5.Some snakes stay warmer than the surrounding air via muscular contractions. This is usually done to keep eggs warm. D.It is possible that dinosaurs had some of the above properties, similar to modern homeotherms , yet still remained ectothermic . Note, though, that giant mammals need to fluctuate their body temperature in hot climates. The Miocene giants may have operated under a different climatic situation than the Mesozoic giants.