Ch 19

Intensive agriculture has in some cases led to ------ , a rapid shift from ------ to desert.

desertification grassland

Which of the following defines conservation biology? An area where a great variety of species are under threat of extinction An event in which many species in many habitats become extinct in the same relatively short interval A field of applied biology that surveys biodiversity and seeks ways to maintain it Actively altering an area in an effort to restore or create a functional ecosystem

A field of applied biology that surveys biodiversity and seeks ways to maintain it

Which of the following are reasons that the ozone layer has not fully recovered? Select all that apply. The global ban on CFCs has been effective at curbing the use of CFCs. Chlorofluorocarbons (CFCs) are highly stable and break down slowly in the atmosphere. Chlorofluorocarbons are highly unstable and break down quickly in the atmosphere. Banned CFCs are continuing to be used illegally.

Chlorofluorocarbons (CFCs) are highly stable and break down slowly in the atmosphere. Banned CFCs are continuing to be used illegally.

Which of the following are ways species are being impacted by global climate change? Select all that apply. Climate change is interfering with the migration patterns of some animal species. Climate change is shifting the timing of leafing and flowering in temperate plants, causing disconnects with associated pollinators. Climate change is causing some species to expand their range to higher latitudes or elevations that were previously too cool to sustain them. Climate change is destroying the main habitats of arctic species such as polar bears.

Climate change is interfering with the migration patterns of some animal species. Climate change is shifting the timing of leafing and flowering in temperate plants, causing disconnects with associated pollinators. Climate change is causing some species to expand their range to higher latitudes or elevations that were previously too cool to sustain them. Climate change is destroying the main habitats of arctic species such as polar bears.

Which of the following are contributions of deforestation to global climate change? Select all that apply. Cut trees are often burned, and this releases carbon into the atmosphere. Conversion of forest to cropland or pasture decreases the rate at which carbon is taken up by plants. Deforestation increases the risk of landslides in cleared regions. Clearing of forests increases the leaching of nutrients in affected regions.

Cut trees are often burned, and this releases carbon into the atmosphere. Conversion of forest to cropland or pasture decreases the rate at which carbon is taken up by plants.

Which of the following is a method to reverse human impacts on the environment? Ecological restoration Construction of housing developments Desertification Deforestation

Ecological restoration

------- species are currently at high risk of extinction in the wild. ----- species are particularly sensitive to environmental changes and can be monitored to assess whether an ecosystem is threatened.

Endangered Indicator