ch56 Flashcards
The branch of biology that is important in controlling overharvesting is _________.
molecular biology
Scientists from Russia and Japan are attempting to resurrect the extinct woolly mammoth __________.
by using well-preserved bone marrow from the thigh of a frozen mammoth
Which statement below describes a finding of researchers who studied the decline of red-cockaded woodpeckers?
Individuals generally have a better chance of reproducing by remaining behind than by dispersing and excavating homes in new territories.
What is one viable solution to help increase the effective size and genetic variation in the grizzly bear population in Yellowstone National Park?
Conservation biologists could introduce just two new bears each decade from another population.
How do climatologists estimate past atmospheric CO2 concentrations?
Climatologists measure the CO2 concentrations in air bubbles trapped in glacial ice.
The destruction of the ozone layer is most directly linked to __________.
the release of chlorofluorocarbons (CFCs) into the atmosphere
An exotic species is a(n) _________.
introduced species
An example of investing in ecosystem services is _________.
the $1 billion that New York City invested to buy land and restore the Catskill Mountains
What did the researchers do that caused red-cockaded woodpeckers to form new breeding groups at new sites?
Constructed nesting cavities at new sites
Loss of “flying foxes” would impact ecosystem diversity because ________.
these bats are important pollinators and seed dispersers in the Pacific Islands and their loss would harm plant diversity
__________ are the most affected by toxic compounds in the environment because __________.
Top-level carnivores; the biomass at any given trophic level is produced from a larger biomass ingested at the level below
Connections between habitat fragments are referred to as __________.
movement corridors
A relatively small area with numerous endemic species and a large number of endangered or threatened species is called a _________.
biodiversity hot spot
One of the most impressive models of sustainable development can be seen in the __________.
Costa Rican zoned reserves
The reason for the decline of the greater prairie chicken in Illinois was _________.
a decrease in fertility due to lack of genetic diversity in the population
What Central American country is a world leader in zoned reserves?
Costa Rica
Which of the following groups is most severely threatened with extinction?
Amphibians
Which of the following is thought to be a possible consequence of rising CO2 levels?
Increased vegetative productivity
The three levels of biodiversity in the correct order are _________ diversity.
genetic, species, and community/ecosystem
Ozone is __________.
beneficial in the upper atmosphere
A small population that inbreeds may ________.
be drawn into an extinction vortex
Mining and forestry result in _________.
habitat loss
An endangered species is one that ________.
is in danger of extinction
The greatest cause of extinction of species today is __________.
habitat alteration
