本题目来源于试卷: Interaction & Interdependence C.8 Populations & Communities，类别为 IB生物学
[单选题]
From the statements listed, whichc oko y) jmr47dvr.40q k0gk e.)(wifs2kkivm ni/0 b +can be considered true of invasive but not native specm20 w i(+kvk)ibf0nk .gise/kies?
A. Species that have evolved and adapted to specific conditions
B. Species mainly found in a specific region
C. Species that are a significant threat to biodiversity worldwide
D. Species that are more vulnerable to environmental changes
参考答案: C
本题详细解析:
Explanation: Invasive species are introduced deliberately or accidentally to new areas outside of their native range, and so have no natural predators. An example would be the zebra mussel which originates from the lakes of Russia and Ukraine. It was accidentally introduced to the Great Lakes of the US through the discharge of a contaminated cargo ship's ballast water. Invasive species have been recognised as a major threat to biodiversity and ecosystems worldwide. They can disrupt native ecosystems, outcompete native species for resources, and lead to declines in native populations. Therefore Choice C is correct. While it is true that some invasive species have evolved and adapted to specific conditions (Choice A) in their native range, this characteristic is also true of native species. Invasive species often have a native region (Choice B), as do native species. Also, some invasive species have a broad native distribution, and when they are introduced to new areas, they can spread widely. Invasive species can be influenced by environmental changes (Choice D), but native species can also be affected by environmental changes, and vulnerability to these changes can vary widely among both invasive and native species.
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