Here is a list of thirty-four types of mammals that are found in India. Mammal: Type # 1. Ornithorhynchus (Duck-billed Platypus): It lays eggs in the nests. The beak or bill is broad and flat just like a duck, hence named as duck-billed platypus. Pinnae are absent. Both the webbed feet and flattened tail help in swimming. Mammary glands are [...]
The below mentioned article provides biology notes on Class Osteichthyes. 1. The endoskeleton is cartilaginous in the embryonic stage, but in the adult forms more or less it is replaced by bones. Thus they have bony endoskeleton. They are ectothermic (cold blooded). There are about 25,000 species of bony fishes. 2. Caudal fin usually homocercal symmetrical (Gr. homos- alike). 3. [...]
The below mentioned article provides short notes on Class Chondrichtyes. 1. The fishes of this class bear cartilaginous endoskeleton. They are cold blooded (poikilothermous or ectothermic). There are about 600 species of cartilaginous fishes. 2. The skin is tough, containing minute placoid scales, which are dermal in origin. 3. Except in the Chimaeras, the gills are not covered by an [...]