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Compare classes with different features part II Class Name Numbers of Heart Cambers Warm-blooded or Cold-blooded...

Compare classes with different features part II

Class Name

Numbers of Heart Cambers Warm-blooded or Cold-blooded ? External or Internal Fertilization Body Covering
Agnatha
Chondrichthyes
Osteichthyes
Amphibia
Reptilia
Aves
Mammalia
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Answer #1
Numbers of Heart Chambers Warm-blooded or Cold-blooded External or Internal Fertilization Body covering
Agnatha 2 cold blooded external In modern agnathans, the body is covered in skin, with neither dermal or epidermal scales.
Chondrichthyes 2 cold blooded external Chondrichthyans have toothlike scales called dermal denticles or placoid scales. Denticles usually provide protection, and in most cases, streamlining.
Osteichthyes 2 cold blooded external All have gills covered with a bony operculum, and a layer of thin overlapping bony scales cover the entire body surface.
Amphibia 3 cold blooded external Amphibians do not have scales, feathers, or even hair like other animals. Since it does not have that protective covering, the skin of an amphibian can easily dry out.
Reptilia 3 cold blooded external Reptilians have epidermal scales covering part or all of their body.
Aves 4 warm-blooded external Their bodies are covered with feathers and whose forelimbs are modified into wings. Most can fly.
Mammals 4 warm-blooded internal Mammals have hair or fur, birds have feathers, reptiles have dry scales, amphibians have soft, moist skin, and fish have wet, slimy scales.
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