Question

Which of these is/are considered the major biomes of world?

• A. Tundra and desert
• B. Tropical rain forest
• C. Tropical deciduous forest
• D. All of the above

Answer 1

Answer: (D)

All of the above

Biomes are very large ecological areas on the earths surface, with fauna and flora (animals and plants) adapting to their environment. Biomes are often defined by abiotic factors such as climate, relief, geology, soils and vegetation. Different scientists classify biomes in different ways. This site, for example lists Tundra, Coniferous Forests, Grasslands, Shrublands, Rainforests, Temperate Deciduous Forests and Deserts as biomes.
The Tundra Biomes: There are two major tundra biomes: The Arctic Tundra and the Alpine Tundra.
The Desert Biomes: They are the Hot and Dry Deserts, Semi Arid Deserts, Coastal Deserts and Cold Deserts.
The Tropical Rainforest is a forest occurring in tropical areas of heavy rainfall. It is abundant with many species of wildlife and vegetation. Rainforests cover less than two percent of the Earth's surface.
Tropical and subtropical deciduous forest biomes have developed in response not to seasonal temperature variations but to seasonal rainfall patterns. During prolonged dry periods the foliage is dropped to conserve water and prevent death from drought. Leaf drop is not seasonally dependent as it is in temperate climates, and can occur any time of year and varies by region of the world.