describe all major habitats of earth …

The place where an organism lives is known as habitat. The term habitat is more specific environment. Habitat constitutes a part of the total environment of that region. It must offer to an organism shelter, food and congenial climatic conditions which will be well-suited for the organism to survive, reproduce and flourish. In other words, a place where suitable conditions for the existence of an organism prevail is the habitat of that organism. For example, the habitat of a fish may be a lake, pond, river, sea or other aquatic systems. The habitats of cacti and camel are sandy, dry, hot deserts. Snowbound, extremely cold Polar Regions are the natural habitats of polar bears. The habitat of Indian rhinoceros is grassland and forest area of the foothills of the Himalayas in Central Nepal and some pockets of plains of west Bengal and Assam. Red blood corpuscle of human blood is the habitat of the malarial parasite (plasmodium).

If we say that fishes live in water and monkeys live in forests, it would not be adequate. Freshwater fishes cannot live in sea water and vice versa. Bonnet monkeys and langurs are found only in the tropical forests of South India, Sri Lanka, Burma, Thailand, Malay, and Singapore. These forests offer to these monkeys a habitat with specific climate, woods, plants and other animals to interact with. The habitat of a tiger must have small animals for the tiger to hunt and feed upon. It should also include thick vegetation in the form of shady trees and shrubs where the tiger can hide and wait for its prey. These conditions form the biotic components of a habitat of tiger. Thus the Himalayan tiger can only live in the Himalayan forests and the Bengal tigers in the Sunderbans. These tigers cannot live in the rocky mountains of North-West America.