Environmental Science
Typically, water vapour occupies about what percentage of the air's volume near the earth's surface?

Less than 4 percent
About 78 percent
Close to 10 percent
None of these
About 21 percent

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Environmental Science
Which among the following is related to the word Mesoderm ?

Forms blood and bone (leads to complex internal organs)
No membrane-bound organelles, no peptidoglycan in cell walls, introns
Binomial system of classification
Anatomically advanced animals having all three germ layers

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Environmental Science
What is UNCED?

United Nations Conference on Environment and Development
United Nations Conference on Education,
United Nations Conference on Environmental Day
None of these

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