The environments animals are in differ significantly. By the whole process of evolution, animals adapt to the habitats they reside in. A fish is tailored to its life in water as well as a spider is customized to some life catching and having insects. Birds are feathered, egg-laying vertebrates, the https://animal-xxx49371.wikifordummies.com/8839274/new_step_by_step_map_for_animal_sex