oviparous

Classification and characteristics of Superclass: Tetrapoda

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Tetra-four, podos-feet Primarily terrestrial, some are secondarily aquatic. Two pairs of pentadactyl limbs. Body covered by an exoskeleton of epidermal hair, feathers or scales. Lungs are main respiratory organs. Amphibian may respire by gills, skin or lungs. 3 or 4 chambered heart present. They are divided into 4 classes: Class 2: Amphibia Amphi-dual; bios-life. Dual … Read more

Differences between poikilothermic and homeothermic animals

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S.N Poikilothermic animals Homeothermic animals 1. Relatively variable body temperature. Relatively constant body temperature. 2. They are oviparous. Thy may be oviparous or viviparous. 3. Most of them have gills for respiration. They have lungs for respiration. 4. They have 2 or 3 chambered heart except crocodile. They have four chambered heart. 5. Their skin … Read more