Percentage of fresh water on Earth is \_\_\_\_\_\_.
Show Hint
- 1\%
- 2.5\%
- 10\%
- 20\%
The Correct Option is B
Solution and Explanation
Only about 2.5\% of Earth's water is freshwater, which includes water in rivers, lakes, glaciers, and underground aquifers. The remaining 97.5\% is saltwater found in oceans. 2. Availability of freshwater:
Of the 2.5\% of freshwater, a large portion is locked in glaciers and ice caps, and only a small fraction is available for human use in rivers and lakes.
Top Questions on Ecosystem
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Read the passage given below and answer the question.
Food chains ‘P’ and ‘Q’ form an interconnection. ‘P’ initiates with wheat grass whose population supports a few grasshoppers, frogs and snakes.
‘Q’ starts with dead decaying leaves of wheat grass which are eaten by earthworms and then food chain is continued with frog of food chain ‘P’.
Identify the types of food chains ‘P’ and ‘Q’:
Study the table given below showing the relationship between organism, its trophic level and kind of food chain it belongs to.
Student to attempt either option (A) or (B).
(A) Identify the type of pyramid given below and write two identifying features of such a pyramid:
OR
(B)
(i) Construct an ideal pyramid of energy when 10,00,000 Joules of sunlight is available.
(ii) Mention the energy obtained by the fourth level of this pyramid.}
- Differentiate between Net primary productivity and Gross primary productivity in an ecosystem.
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