Organisms and Populations Test - 3

Biotic components include all living organisms present in an ecosystem. Competitors and predators are biotic components of habitat.

The organisms that can change their body temperature according to environment are called poiklotherm or cold blooded animals. Tapeworm and naked mole rat are examples of cold blooded animals.

The term ecology, silent spring and ecosystem were coined by Haeckel, Carson and Tansley respectively. The term biome was not coined by Hutchinson.

Biome, as coined and applied by Clements, was not the ecosystem.

Artificial ecosystems are man-made ecosystem. Crop field and aquarium are examples of artificial ecosystem as they are man-made.

Inside the human intestine a number of microbes lives that helps in digestion of food and formation of vitaminK. so, human intestine is also an unique habitat.

Crassulacean acid metabolism photosynthesis pathway is present as adaptation in xerophytes in which stomata opens during night to prevents loss of water by transpiration.

Carrying capacity of a habitat is the maximum number of individual that can survive in given habit. There is a limitation of food, water and space in a habitat so only limited numbers of individual survive.

Interactions between different species living within a particular area may be useful as in case of mutualism, fatal as in case of parasitism or neutral in which no one is harmed.

A majority of organisms are restricted to narrow range of temperature. Such organisms are called stenothermal species. The distribution range of these species will be adversely affected if average global temperature keeps increasing.