Earth’s biosphere is described as
Which factor can cause secondary succession?
Which statement best describes an effect of large asteroid and comet impacts?
On May 18, 1980, Mount St. Helens in Washington State experienced a huge volcanic eruption after a magnitude 5.1 earthquake. During the eruption, hot ash and pumice poured down the west, south, and east sides of the mountain, melting the snow and ice at the top of the volcano and producing volcanic mudflows. Which type of process first occurred in the ecosystem around Mount St. Helens after it erupted?
What event might occur when favorable adaptations build up in a population over many generations?
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