A Landslide in the Oregon Cascades Causes All the Soil

question 9

Multiple Choice

A landslide in the Oregon Cascades causes all the soil in a 30-meter by 300-meter section of a mountain to fall away,taking the trees and their roots and all other vegetation with it.Within three years,however,lichens and some small herbaceous plants can be seen on the surface of the remaining rock.This is an example of:

• A)secondary succession.
• B)primary succession.
• C)a climax community.
• D)facilitation.

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