What is an invasive species?

• A native (naturally found) species which are added to an area. 
• A non-native (not naturally found) species added to an area. 
• A keystone species in an environment
• none of the above

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Biologists put extra effort into protecting these because they have many species living in them.

• Cities
• Biodiversity Hotspots
• Farms
• Conservation stations

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An event  in which a large percentage of all living species become extinct in a relatively short period of time.

• Habitat fragmentation 
• Mass extinction
• Overexploitation
• Background extinction

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The Sikhote-Allin Mountains, and the Siberian tigers living on them, are separated from other mountain regions in which the tigers could live. The mountains are an example of a(n)

• mass extirpation

• invasive species

• mass extinction

• habitat fragment

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The convention on international trade in endangered species of wild fauna and flora (CITES) and the convention on biological diversity are examples of:

• organization that promote poaching

• polls measuring American opinion about biodiversity

• treaties to protect biodiversity

• laws to increase the number of species

High levels of biodiversity tend to

• have little or no effect on ecosystems

• decrease an ecosystem's resistance to change

• increase the stability of an ecosystem

• make an ecosystem less resilient

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The biggest cause of biodiversity loss today is

• climate change

• over-harvesting

• habitat change and fragmentation

• pollution

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What is the major law in the United States that protects biodiversity?

• Convention on Biological Diversity

• Endangered Species Act

• US Fish and Wildlife Service

• Species Survival Plan

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A plan to establish an 8000km long strip of land across eight SE Asian countries to rejoin fragments of habitats is an example of

• wildlife corridor

• world biodiversity treaty

• captive breeding program

• conservation concession

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Salt water is an abundant resource but unusable for irrigation and drinking. As demands on freshwater sources increase, the use of desalination processes to remove salt from ocean water is increasing. A concern of desalinating water is the large amounts of recovered salts that are returned to the ocean. Which of the following describes the most likely impact of desalination on the surrounding ocean environment?

• Alteration of habitat

• methane pollution from dead organisms

• depleting of nonrenewable resources

• overpopulation of bivalves

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