Animals can be classified according to their mode of thermoregulation. Sort the animals below, indicating their likely thermoregulatory strategy. Note that poikilotherms are sometimes referred to as heterotherms.
Drag each animal to the appropriate bin.
Animals: Eagle Coyote Butterfly Salamander Walrus ArcticShrimp FreshwaterCatfish
Categories: Homeothermic endotherm, Homeothermic ectotherm, Poikilothermic ectotherm

Homeothermic endotherm - walrus, eagle, coyote

Homeothermic ectotherm - arctic shrimp

Poikilothermic ectotherm - salamander, freshwater catfish, butterfly

Explanation:

Homeothermic animals are those that are capable of maintain a relatively constant body temperature irrespective of the environmental temperature while poikilothermic animals are those whose body temperature varies along with the temperature of the environment.

Homeothermic/poikilothermic animals function either by generating their own body heat (endothermic), or by extracting heat from the environment to maintain this constant body temperature (exothermic).

Homeothermic endotherms include most birds and mammals along with some fishes.

Homeothermic ectotherms include organisms in deep lake or oceans including tropical reptiles.

Poikilothermic endotherms include some birds and mammals, several insects and some invertebrates.

Poikilothermic ectotherms include most invertebrates, fishes, amphibians and reptiles.

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in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".