8/6/2023 0 Comments Jaws of extinction demoSo, the correct option is option “A” Aves.īirds live and breed in most terrestrial habitats and on all seven continents, reaching their southern extreme in the snow petrel's breeding colonies up to 440 kilometres (270 mi) inland in Antarctica. Snakes have curved teeth to prevent the escape of prey and flexible jaws help them to catch the larger prey. Heart is completely four chambered and are warm blooded animals that means they are able to maintain a constant body temperature.Īir sacs are connected to lungs and sexes are separate and fertilisation is internal.Īves class includes Crow, Pigeon, Peacock etc. The digestive tract of birds has additional chambers, the crop and gizzard. Skin is dry without glands except the oil glands.Įndoskeleton is fully bony and the long bones are hollow with air cavities. The hind limbs generally have scales and are modified for walking, swimming or clasping of bird branches. The forelimbs of the beak are modified into wings. The characteristics of aves are the presence of feathers and most of them can fly except flightless birds such as ostrich.
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