Environmental Science
Two opposite forces operate in the growth and development of every population. One of them is related to the ability to reproduce at a given rate. The force opposite to it is called

mortality
biotic control
environmental resistances
fecundity

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Environmental Science
The primary cause of a radiation inversion is:

Solar radiation absorbed by the earth's surface
Infrared radiation emitted by the earth's surface
Solar radiation reflected by the earth's surface
Infrared radiation absorbed by the atmosphere and clouds
Infrared radiation absorbed by the earth's surface

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Environmental Science
Which of the following helps to explain why even though northern latitudes experience 24 hours of sunlight on June 22, they are not warmer than latitudes further south?

Some of the sun's energy is reflected by snow and ice in the northern latitudes
Solar energy is used to melt frozen soil in the northern latitudes
Solar energy is spread over a larger area in northern latitudes
All of these
Increased cloud cover reflects solar energy in the northern latitudes

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Environmental Science
The order of succession in a hydrosere is

Rooted aquatic plants-> phytoplankton->Free floating stage-> Sedge Meadow stage-> Reed swamp stage-> wood land stage-> Climax forest
phytoplankton->Rooted aquatic plants->Free floating stage->Reed swamp stage-> wood land stage-> Sedge Meadow stage-> Climax forest
Rooted aquatic plants-> phytoplankton->Free floating stage->Reed swamp stage->Sedge Meadow stage-> wood land stage-> Climax forest
phytoplankton->Rooted aquatic plants->Free floating stage->Reed swamp stage->Sedge Meadow stage-> wood land stage-> Climax forest

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