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Environmental Science

Environmental Science
When human body is infected by infection __________ type of cells are activated to defend the body.

leukocytes
lymphocytes
monocytes
erythrocytes

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Environmental Science
Which one of the following ecosystem type has the highest annual net primary productivity?

Temperate deciduous forest
Tropical rain forest
Tropical deciduous forest
Temperate evergreen forest

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Environmental Science
The crucial species that determine the ability of large number of other species is termed as _________ species.

Important
Crucial
Keystone
Significant

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Environmental Science
Gharial is a

Cobra
Crocodile
Tortoise
Frog

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Environmental Science
_________ are used for converting saline or brackish water into pure distilled water.

Solar desalination systems
Photo voltaic cells
Solar cookers
Solar water-heating

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Environmental Science
The presence of high coliform counts in water indicates

phosphorus contamination
contamination by human wastes
hydrocrbon contamination
decreased Biological Oxygen Demand

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