Reptiles belong to the class Reptilia under subphylum Vertebrata of phylum Chordata. The representatives of modern reptiles include turtles and tortoises, crocodiles and aligators, snakes, lizards, amphisbaenians and, tuataras. The science which deals with study of modern amphibians and reptiles is collectively called herpetology. The body size ranges from 17 mm (0.7 inches) to … Read more
Aves is a class of vertebrates that comprises the birds’ species. Birds are bipedal, feathered, and endothermic egg-laying animals. They are found worldwide, and their size ranges from 5 cm (bee hummingbird) to 2.75 m (ostrich). Among the tetrapod classes, birds constitute the largest number of species. There are about 10,000 living modern bird species … Read more
Ecological balance is maintained when the environmental factors remain in a state of balance. If one or more of these factors are disturbed to any extent, then they may be recovered soon. But gross natural calamities like flood, earthquake, volcanic eruption, etc. destroy the ecological balance considerably and environmental organisms are liable to destruction. The … Read more