Multiple Choice
Which of the following is an example of descent with modification?
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1. Introduction to Biology
Natural Selection and Evolution
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Based on the intermediate disturbance hypothesis, a community's species diversity is increased by:
A
moderate levels of disturbance
B
very low levels of disturbance
C
very high levels of disturbance
D
complete absence of disturbance
Verified step by step guidance1
Understand the intermediate disturbance hypothesis: This hypothesis suggests that species diversity in a community is highest at moderate levels of disturbance. Too little disturbance allows dominant species to outcompete others, while too much disturbance prevents many species from establishing.
Define disturbance: Disturbance refers to events that disrupt ecosystems, such as fires, storms, or human activities. These events can affect the availability of resources and the survival of species.
Analyze the impact of low disturbance: At very low levels of disturbance, competitive exclusion occurs, where dominant species monopolize resources, reducing overall species diversity.
Analyze the impact of high disturbance: At very high levels of disturbance, frequent or intense disruptions prevent many species from surviving or reproducing, leading to lower diversity.
Conclude the role of moderate disturbance: Moderate levels of disturbance create conditions where both competitive and less competitive species can coexist, promoting higher species diversity in the community.
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