world physical geography section 3 MCQ Questions & Answers Detailed Explanation

Answer: (d)

1. An epiphyte is a plant that grows harmlessly upon another plant (such as a tree) and derives its moisture and nutrients from the air, rain. Epiphytes provide a rich and diverse habitat for other organisms including animals, fungi, bacteria etc. Selvas is found in South America.
2. Savanna is a rolling grassland scattered with shrubs and isolated trees, which can be found between a tropical rainforest and desert biome. Savanna is found in Africa, South America, India, and Australia.
3. Tundra is a type of biome where tree growth is hindered by low temperatures and short growing seasons. Tundra is the coldest of all the biomes. The vegetation is composed of dwarf shrubs, sedges and grasses, mosses, and lichens.
4. Tropophytesis a kind of plant adapted to climatic conditions in which periods of heavy rainfall alternate with periods of drought. It grows in monsoon land.

Answer: (a)

The Nile, a major north-flowing river in northeastern Africa, is generally regarded as the longest river in the world. It is 6,853 km long. The Amazon (South America) and Yangtze of China are at second and third positions with a length of 6400 km and 6300 km respectively.

Answer: (a)

All the above statements are correct.

Answer: (b)

The Gulf Stream, together with its northern extension towards Europe, the North Atlantic Drift, is a powerful, warm, and swift Atlantic ocean current that originates at the tip of Florida, and follows the eastern coastlines of the United States and Newfoundland before crossing the Atlantic Ocean.

It influences the climate of the east coast of North America from Florida to Newfoundland and the west coast of Europe.

Answer: (b)

Answer: (a)

The Arctic Ocean has the widest continental shelf of all the oceans; it extends 1,210 km seaward from Siberia.

From the shelf rise numerous islands, including the Arctic Archipelago, Novaya Zemlya, the New Siberian Islands, and Wrangle Island. Continental shelves are an extension of coastal plains and are characterized by broadly sloping submerged plains.