AP Enviro: Chapter 9
Terms in this set (48)
Bees use ____ to make ____.
Colony Collapse Disorder is when _____.
honey bees leave in winter and dont return to hives in spring
the key role of honey bees is to ______.
The rate at which extinctions occurred prior to the evolution of modern humans is called the ____.
background extinction rate
The extinction of many species in a relatively short period of geologic time is called ____.
Biodiversity experts estimate that during this century, the extinction rate due to human activities will rise to ____ times the background extinction rate.
If estimates of an extinction rate 10,000 times greater than the background rate are correct, then what percentage of all species will be extinct by the end of this century?
The estimate of the background extinction rate is thought to be too low. Which explanation for why the estimate may be low is false?
The growing human population is using fewer resources per person.
After a mass extinction, what happens to biodiversity rates?
They recover over millions of years.
Biodiversity hotspots are ____.
areas with a variety of threatened or endangered species
An endangered species ____.
may soon become extinct over all or most of its range
A threatened species ____.
is one that is likely to become endangered
Throughout the 3.5 billion year history of life on the earth, there has been a natural, low rate of species extinction know as ____.
background extinction rate
______ are the most threatened w/ extinction b/c of human activities.
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. Which one is it?
low reproductive rates
feeds at high trophic level
Biologists think there are four major reasons why we should work to prevent human activities from causing the extinction of other species. Which of the following is not one of these reasons?
We need animals, especially rare animals, for zoos.
Bioprospectors are ________.
people who search for plants and animals scientists can use to make medicinal drugs
What percentage of the world's known plant species have been examined for medicinal properties?
Because birds live in every climate and biome, and because they are easy to track and count, they serve as excellent ____.
What percentage of the world's 10,000 bird species is declining in number?
Some toxic chemicals, such as those in DDT, can be stored in the fat tissue of animals. As these animals become food for larger and larger animals, the amount of the toxin gets larger and larger. What is this process called?
Which effect below is not a result of global warming?
polar bear's hunting season is getting longer
A 2006 study estimated the total polar bear population is likely to decline by how much by 2025?
Which statement about the introduction of non-native species is false?
nonnative species provide no benefits to their new habitats
Which of the following statements about kudzu is false?
it can be controlled by normal weed control measures
What species was intentionally introduced into the US?
HIPPCO is _____.
acronym summarizing causes of extinction.
Which invasive species threatens the Florida Everglades?
DDT use in the 1950s and 1960s was nearly responsible for the extinction of what familiar bird species?
Population declines among birds, especially long-distance migrant birds, have several primary causes. Which of the following is not one of these?
intentional poisoning of food supplies
Four of the following have resulted in an increase in hunting bushmeat; one has not. Which one is not a cause of this increase?
spread of AIDS
illegal hunting for profit is ______.
According to researchers, the greatest threat to wild species is ____.
In terms of habitat destruction, the greatest eliminator of species is the ____.
deforestation in tropical areas
When a large, contiguous area of habitat is reduced in area and divided into smaller, more scattered patches, the process is called ____.
The most far-reaching and controversial environmental law ever adopted requiring the identification of endangered and threatened species is ____.
the Endangered Species Act
When the Endangered Species Act was established in 1973, the list included 92 U.S. species. In 2010, that number had risen to ____.
Which scenario would be allowed under a habitat conservation plan?
landowner, developer, or logger is allowed to destroy some critical habitat in exchange for taking steps to protect members of the species
What group of animals receives the most protection by the use of wildlife refuges?
______ is not one of the 4 ways that the pressure can be taken off of some endangered species.
Harvesting endangered species to preserve their skins and bones.
Captive breeding programs in zoos ____.
require the captive population to number between 100 and 500
egg pulling refers to _____.
collecting eggs from the wild and hatching them
What idea proposes that we take measures to prevent harm to the environment and human health even if the science has not been fully established?
We know that the introduction of nonnative species often results in unforeseen consequences. This indicates that when introducing nonnative species, we would be well advised to apply the
CITES is a(n) ____.
treaty controlling the international trade in endangered species
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. What has slowed this progress?
the lack of ratification by the U.S.
There are many actions an individual can do take to help protect endangered and threatened species. Which of the following is least likely to be effective?
Spread the word about the importance of this issue.
Biologists believe the Endangered Species Act has been successful, but critics say it is a failure. Which argument below supports the critics?
Federal regulators have been heavy handed in enforcing the act.
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