Fish and amphibians

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  • The earliest amphibians evolved in the Devonian Period from sarcopterygian fish with lungs and bony-limbed fins, features that were helpful in adapting to dry land. They diversified and became dominant during the Carboniferous and Permian periods,but were later displaced by reptiles and other vertebrates. Over time, amphibians shrank in size and decreased in diversity, leaving only the modern subclass Lissamphibia.

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  • Product Description Freshwater aquarium hobbyists will find all the information they need regarding purchasing, feeding, and maintaining this delicately-hued tropical fish. Heavily illustrated with vivid color photos and instructive line art, Barron's Complete Pet Owner's Manuals show and inform pet owners regarding proper care of dogs, cats, birds, fish, reptiles, amphibians, small caged animals-

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  • Storks and cranes are long-legged, wading birds, typically found in marsh areas. Storks and cranes feed on fish, reptiles, amphibians, and insects that they catch using their long heavy bills. Ebook Animals: Cranes and Stork includes about beauty on the wing, avid eaters, faithful parents, long-distance fliers, storks, cranes and people.

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  • Prion proteins (PrP) of mammals, birds, reptiles and amphibians have been successfully cloned, expressed and purified in sufficient yields to enable 3D structure determination by NMR spectroscopy in solution. More recently, PrP ortholog genes have also been identified in several fish species, based on sequence relationships with tetrapod PrPs.

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  • A robust body of literature details reproductive effects in fish, amphibians, and reptiles related to exposure to endocrine disruptors. Evidence of these effects has also been seen in wild mammals such as polar bears and seals. Environmental exposure assessments and wildlife, laboratory and epidemiologic studies show exposure to low-level environmental contaminants, such as pesticides and other chemicals, subtly undermines the ability to reproduce.

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  • Chapter 42 - Circulation and gas exchange. After studying this chapter you will be able to: Compare and contrast open and closed circulatory systems; compare and contrast the circulatory systems of fish, amphibians, reptiles, and mammals or birds; distinguish between pulmonary and systemic circuits and explain the function of each; trace the path of a red blood cell through the human heart, pulmonary circuit, and systemic circuit;...

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