Environmental Science
The north-facing side of a hill in a mountainous region in the US tends to:

Have snow on the ground for a longer period of time in winter compared to the south-facing side
Receive less sunlight during a year than the south-facing side
Be a better location for a ski run than the south-facing side
All of these
Grow a variety of trees that are typically observed at higher elevation

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Environmental Science
What is the cause of the Exxon Valdez?

Oil Tanker which sank in 1989 along the coast of Alaska and marine life seriously affected.
none of these.
a plane which crashed and caused death of human life
a ship which wrecked on the coast of India

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Environmental Science
The order of succession in a lithosere or xerosere is

Crustose lichen stage->Foilose lichen stage->moss stage-> ->shrub stage-> herb stage->forest stage (climax community)
Crustose lichen stage->Foilose lichen stage->moss stage->herb stage>shrub stage->forest stage (climax community)
Moss stage ->Foilose lichen stage-> Crustose lichen stage ->herb stage->shrub stage->forest stage (climax community)
Foliose lichen stage->Crustose lichen stage->moss stage->herb stage>shrub stage->forest stage (climax community)

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