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A dark-coloured substance formed from dead remains of plants and animals is called
Which of the following layers of soil supports plant growth?
The water holding capacity is highest in:
Why is organic matter (humus) an important part of soil?
Which of the following factors is/are responsible for the depletion of the world’s natural resources?
i. Decreasing numbers of vehicles in use
ii. A decrease in the human population
iii. The greater use of biodegradable products
A flash flood is a flood that:
Which of the following is an environmental consequence of floods?
Which of the following statements is false?