Introduction Animal inhabiting the aerial environment show many Volant (flying) adaptation for the aerial mode of existence. These animals are known as volant forms. Fishes, amphibians, reptiles, birds and mammals among vertebrates, and insects among invertebrates exhibit volant adaptations. Flight is of two types: i) active or true flight b) passive flight or gliding. A) … Read more
Introduction of Amphibians Amphibians are the first group among the chordates that live outside water. Several new features for terrestrial life also developed in amphibians. Organs of locomotion and protection against desiccation are characteristics. They are not the true land vertebrates though they were the first to emerge from water. Most of the amphibians are … Read more
Evolution is a process by which living things change over time and adapt to the conditions of their environment. It may be also defined as the gradual development of the characteristics of plants and animals over time. Everything in this world changes continuously through space and time. Changes relate to plants and animals (living organisms) … Read more
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