Exam 9: Sustaining Biodiversity: the Species Approach

Four of the following are characteristics that make some species especially vulnerable to ecological and biological extinction.One of the following is not such a characteristic.Choose the one that is not a characteristic.

Egg pulling refers to

Approximately 24% of the world's known plant species have been examined for their medicinal properties.

By the end of this century polar bears may only be found in zoos.

There are many actions an individual can do take to help protect endangered and threatened species. Which of the following is not one of these actions?

Note that 51% of freshwater species of fish and the overall percentage of fish that are endangered is 34%.What does that mean about the percentage of saltwater fish that are endangered?

The extinction of many species in a relatively short period of geologic time is called

Four of the following are causes of an increase in hunting bushmeat; one is not.Choose the one that is not.

The passenger pigeon, perhaps the must abundant bird on earth in 1813, was extinct less than one hundred years later because of human activities.

Human activities, especially those leading to habitat loss and climate change, are likely to lead to the extinction of between _______________ and _______________ of the world's plant and animal species.

The primary causes of population declines among birds, especially long-distance migrant birds, includes all of the following, except

Burmese and African ____________________ along with several other similar species, have ended up in the Everglades in Florida, after being released by their owners because they did not make good pets.

What percentage of the world's 10,000 bird species is declining in number?

The Convention on Biological Diversity, ratified by 191 countries, seeks to reverse the global decline of biodiversity and share the benefits from the use of genetic resources, but has been slowed by

The use of the anti-inflammatory drug diclofenac in cattle caused the die-off of vultures and increased the incidence of which of the following diseases?

When the Endangered Species Act was established in 1973, the list included 92 U.S.species.In 2010, that number had risen to

Some critics of the ESA suggest it has been a failure.Four of the following are reasons they give for that conclusion; one is not.Choose the one that is not.

A 2005 report estimates the current annual rate of species extinction is at least ____________________ to ____________________ times the background rate that existed before modern humans appeared.

Only about 30% of the world's rare and threatened plant species are being grown in the world's botanical gardens and arboreta.

Captive breeding programs in zoos