Environmental Science
Mycorrhiza represents

Symbiotic association between a fungus and liverworts
Parasitic association between a fungus and roots of plants
Parasitic association between a fungus and an alga
Symbiotic association between a fungus and roots of higher plants

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

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

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