_____________ is the number of deaths in the population during a given period.
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Study of earth is known as
Halophytes are plants that grow in
Which of the following three R's are regarded as environment friendly?
An _______________ is a sudden shaking or trembling of the earth.
_______ is the study of the physical form and external structure of plants.
Which of the following is least likely to be an effect of global warming?
Dakshin Gangotri is a research base station set up by Indian scientists. Where is it located?