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प्रश्न
What substances in the soil are useful for the growth of plants?
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उत्तर
- Plants require water, minerals, and other substances in the soil for their growth.
- The substances formed due to the decomposition of dead and decaying plant and animal material are very useful for plants.
- These substances help in the rapid growth of plants.
संबंधित प्रश्न
Name the organisms whose uncontrolled activities are damaging the environment.
The use of one of the following will pollute the environment. This one is :
(a) paper carry bags
(b) cotton cloth carry bags
(c) nylon cloth carry bags
(d) jute carry bags
Write the percentage of solar energy captured by the autotrophs.
"Burning fossil fuels is a cause of global warming." Justify this statement.
What’s the solution?
We have to remove insects from the grain without using insecticides.
What are the different purposes for which fuels such as petrol, diesel, kerosene, natural gas, coal, and wood are used?
Give reason.
It is important to conserve the living components of the environment.
Classify the following as natural or man-made.
Soil.
Classify the following as natural or man-made.
water hyacinth.
Classify the following as natural or man-made.
sunlight
Classify the following as natural or man-made.
water
Classify the following as natural or man-made.
pen
Classify the following as natural or man-made.
brick
Producers are ________.
It is a biodegradable waste.
_______ is the process of converting waste materials into new materials.
Excessive exposure of humans to UV-rays results in
- damage to immune system
- damage to lungs
- skin cancer
- peptic ulcers
Select the mis-matched pair in the following and correct it.
Explain some harmful effects of agricultural practices on the environment.
