Environmental Science
What is meant by ex-situ conservation?

Conservation of a species outside its natural habitat
Conservation of plants
Conservation of a species by protecting its habitat along with all other species living there
Conservation of forest eco system

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Environmental Science
Much of Tibet lies at altitudes over 18,000 feet where the pressure is about 500 mb. At such altitudes, the Tibetans are above roughly:

25% of the air molecules in the atmosphere
50% of the air molecules in the atmosphere
75% of the air molecules in the atmosphere
10% of the air molecules in the atmosphere

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Environmental Science
During an equinox:

The days and nights are of equal length except at the poles
At noon the sun is overhead at the equator
The earth is not tilted toward nor away from the sun
All of these

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