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06-05-2016
Biology

contestada

How much oxygen is contained in the atmosphere?
a. 20%
b. 21%
c. 22%
d. 23%

What is slowed when water is a limiting factor in an environment?
a. amount of evaporation
b. population growth
c. the types of rocks

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youdane youdane

07-05-2016

Oxygen makes up 20% of the atmosphere while nitrogen makes up 78%. The other two percent is made up of other gases. Population growth would slow. Organisms need water to survive and if there is a limited amount of water, populations will decline.

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