Problem
Describe the structures of "cold-blooded" and "warm-blooded" ecosystems of the past and present. Include in your answer: a. a description of ectothermic poikilothermy and endothermic homeothermy, b. a description of trophic pyramid structures for the two types of ecosystems and the effects of the removal or diminution of one level in the pyramid, c. a description of the effect of predator size on prey choices and the different adaptations of large predators.