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Multiple Choice
Introduced species can have deleterious effects on biological communities by:
A
decreasing the spread of diseases among native species
B
increasing the genetic diversity of native populations
C
promoting the recovery of endangered native species
D
outcompeting native species for resources
Verified step by step guidance
1
Understand the concept of introduced species: Introduced species, also known as invasive species, are organisms that are brought into a new environment where they are not native. These species can disrupt ecosystems and biological communities.
Analyze the potential effects of introduced species: Introduced species often compete with native species for resources such as food, water, and habitat. This competition can lead to a decline in native populations.
Evaluate the incorrect options: Decreasing the spread of diseases among native species, increasing genetic diversity, and promoting the recovery of endangered species are generally not associated with introduced species. In fact, introduced species can sometimes increase disease spread or reduce genetic diversity by dominating ecosystems.
Focus on the correct answer: Introduced species can outcompete native species for resources, which is a major reason for their negative impact on biological communities. This competition can lead to reduced population sizes or even extinction of native species.
Summarize the key takeaway: The primary deleterious effect of introduced species is their ability to outcompete native species for essential resources, disrupting the balance of the ecosystem and threatening biodiversity.