- The study of fossil plants and animals and of the rock formations where they are found
- The information is used increasingly in environmental sciences to build up a picture of past environments
- Both (a) & (b)
- None of these
Author: Zabeehullah
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- The protective layer of ozone in the upper stratosphere, found at a level between 15 and 150 km above
- The Earth which prevents harmful ultraviolet B radiation which causes skin cancer and threatens plant life from reaching the ground
- Both (a) & (b)
- None of these
- The prairies of North America and the steppe of Russia and Central Asia
- Grassland ecosystem support thousand of different species, above and below the ground
- Both (a) & (b)
- None of these
- An abundant family of simple mostly marine organisms
- The important to scientists who are studying climatic change
- Both (a) & (b)
- None of these
- A group of plants which include maize and sorghum
- The process of carbon fixation usually found in tropical plants with high growth rates
- Both (a) & (b)
- None of these
- The part of the earth that supports life and consists of the soil, oceans
- The waterways and the atmosphere upto 15 km above the earth's surface
- Both (a) & (b)
- None of these
- The large coniferous forest areas in the northern hemisphere between the latitudes of 50
- Large areas of boreal forest are found in Scandinavia, Siberia and Northern America
- Both (a) & (b)
- None of these
- The north polar regions but it has also become used to denote the territory lying within the Arctic Circle
- The landscape, climate and plant and animal life found in those regions
- Both (a) & (b)
- None of these
- A type of pollution which washes out of the atmosphere as dilute sulphuric and nitric acids
- It tends to be a regional rather than a global phenomenon linked to particular industrial activities and meteorological conditions
- Both (a) & (b)
- None of these
- The name given to the first report of changes in the amount of ozone
- The upper layers of the atmosphere over the south pole
- Both (a) & (b)
- None of these
- The process by which plants and animals become accustomed to unusual environmental conditions
- That they are able to live and produce
- Both (a) & (b)
- None of these
- Fertilizer: Manure: any substance applied to soil fertility and increase plant growth and yield, these may be organic in organic or of bio-origin
- Organic fertilizers: prepared from plant residues (cotton seedcake, groundnut cake etc.)
- Both (a) & (b)
- None of these
- Agents that pollute; these may be gaseous (vapours) or particulate (solid and liquid particles)
- On the basis of the amount and their relative harmfulness or toxicity
- Both (a) & (b)
- None of these
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