Explain natural and human-made sources of air pollution.
Explain natural and human-made sources of air pollution.
Air pollution is of two main types:
Natural: It is the pollution caused by nature. It includes forest fires, dust storms, pollen etc.
Human made: It is the pollution caused by human activities. It includes burning of fossil fuels in industries, vehicles and thermoelectric plants, gaseous emission from industries, mining, processing and stone crushing.
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Distinguish between prokaryotic and eukaryotic cells.
Doctor diagnosed that Radha was suffering from HIV-AIDS. List any two methods by which she might have contracted the disease. Name the organ affected by this disease.
List three groups of plants. Which plants are referred to as vascular plants? Out of these which group is further classified on the basis of number of cotyledon? State its two characteristics.
What is the contribution of Margulis and Schwartz?
Describe the biological method of weed control.
What will happen if: