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Test: Life On The Earth


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10 Questions MCQ Test Geography for UPSC CSE | Test: Life On The Earth

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Test: Life On The Earth - Question 1

Tropical grasslands are also known as the

Detailed Solution for Test: Life On The Earth - Question 1

Tropical grasslands, or savannas, lie north and south of tropical rain forests that are on the equator. Some areas beyond savannas are hot deserts. Other savannas may be lined with mountains, dense forests, and seas. South America is a home to several large savannas.

Test: Life On The Earth - Question 2

Which of the following organism have parasitic mode of nutrition?

Detailed Solution for Test: Life On The Earth - Question 2

In parasitic nutrition organism derives its food from the body of another living organism called host without killing it. Parasitic mode of nutrition is observed in several fungi, bacteria, few plants like Cuscuta and some animals like Plasmodium and round worms. Plasmodium causes malarial disease.

Test: Life On The Earth - Question 3

Abiotic factors include

Detailed Solution for Test: Life On The Earth - Question 3

All ecosystems consist of abiotic and biotic factors. Abiotic factors include rainfall, temperature, sunlight, atmospheric humidity, soil conditions, inorganic substances. Biotic factors include the producers, consumers and decomposers.

Test: Life On The Earth - Question 4

Which of the following in biology is the energy currency of cells?

Detailed Solution for Test: Life On The Earth - Question 4

The process of releasing energy from food is called respiration. The energy is stored in the form of ATP (Adenosine tri phosphate) in the body cells which is used for various purposes like contraction of muscles, conduction of nerve impulses, synthesis of proteins and many other activities related to the functioning of cells. Therefore, ATP is known as the energy currency of cells.

Test: Life On The Earth - Question 5

Temperate Steppe is a subtype of which biome?

Detailed Solution for Test: Life On The Earth - Question 5

Temperate steppes are areas with a semiarid continental climatic regime in which, despite maximum summer rainfall, evaporation usually exceeds precipitation. It is in parts of Eurasia and North America.

Test: Life On The Earth - Question 6

Freshwater ecosystem includes

Detailed Solution for Test: Life On The Earth - Question 6

Aquatic ecosystems can be classed as marine and freshwater ecosystems. Marine ecosystem includes the oceans, coastal estuaries and coral reefs. Freshwater ecosystem includes lakes, ponds, streams, marshes and bogs.

Test: Life On The Earth - Question 7

The boundaries of different biomes on land are determined mainly by

Detailed Solution for Test: Life On The Earth - Question 7

The distinguishing features of terrestrial biomes are determined mainly by climate. Terrestrial biomes include tundras, temperate forests and grasslands, chaparral, temperate and tropical deserts, and tropical forests and grasslands.

Test: Life On The Earth - Question 8

The type of soil the desert biome has is

Detailed Solution for Test: Life On The Earth - Question 8

Desert is very fragile in many ways, because of the scarcity of water and plants. Most plants that live in the desert take a long time to grow. Once plants are destroyed, it will take many years for them to grow back. Since, soil in the desert is held down by plant roots, once plants are destroyed the soil is, too. The soil will quickly erode away in the strong winds. Soils often have abundant nutrients because they need only water to become very productive and have little or no organic matter.

Test: Life On The Earth - Question 9

A freshwater ecosystem is

Detailed Solution for Test: Life On The Earth - Question 9

Aquatic ecosystems can be classed as marine and freshwater ecosystems. Marine ecosystem includes the oceans, coastal estuaries and coral reefs. Freshwater ecosystem includes lakes, ponds, streams, marshes and bogs.

Test: Life On The Earth - Question 10

Mineral salts come directly from

Detailed Solution for Test: Life On The Earth - Question 10

Mineral salts come directly from the earth’s crust by weathering where the soluble salts enter the water cycle, eventually reaching the sea.

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