Multiple Choice
Which statement accurately describes Darwin's experience on the HMS Beagle?
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1. Introduction to Biology
Natural Selection and Evolution
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Which of the following events would most likely lead to secondary succession in an ecosystem?
A
The retreat of a glacier exposing bare rock
B
The formation of new land from cooled lava after a volcanic eruption
C
A forest fire that destroys most vegetation but leaves the soil intact
D
The initial colonization of a sand dune by pioneer species
Verified step by step guidance1
Understand the concept of secondary succession: Secondary succession occurs in an ecosystem where the soil remains intact but the vegetation and organisms have been disturbed or removed. This contrasts with primary succession, which starts on bare surfaces without soil.
Analyze the options provided: Secondary succession typically follows events that leave the soil intact but remove vegetation, such as forest fires, floods, or human activities like farming.
Evaluate the first option (retreat of a glacier exposing bare rock): This describes primary succession because it involves bare rock without soil, requiring pioneer species to establish the ecosystem.
Evaluate the second option (formation of new land from cooled lava): This also describes primary succession, as the cooled lava forms a new surface without soil, requiring initial colonization by pioneer species.
Evaluate the third option (a forest fire that destroys most vegetation but leaves the soil intact): This is an example of secondary succession because the soil remains, allowing plants and organisms to recolonize the area more quickly than in primary succession.
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