WorksheetsChapter 10 Test Review
Total questions: 21
Worksheet time: 12mins
Variety of organisms in a given area, genetic variations within a population, variety of species in a community, and varieties of communities in an ecosystem are all definitions of
biodiversity
genetic diversity
ecosystem diversity
species diversity
How many species are estimated to be living on Earth?
between 10,000 and 1,000,000
between 500,000 to 1 million
between 1 million and 5 million
between 10 million and 50 million
All of the following are reasons why there are so many species still unknown to modern science EXCEPT
many are found in remote environments
smaller species receive less attention than larger organisms
cataloging these species is a huge task
scientists believe that we have cataloged more than enough species already
_________ diversity refers to the variety of habitats, communities, and ecological processes within and between ecosystems.
Species
Ecosystem
Genetic
Breed
_________ diversity is all the different genes contained within a population.
Species
Ecosystem
Genetic
Breed
(a) species are critical to the functioning of an ecosystem
Reasons for preserving biodiversity include all of the following EXCEPT
isolating unique genetic material so it can be incorporated into existing crops
increasing the chances of discovering organisms with medicinal value
preventing natural evolution
finding new plants that can supplement the world's food supply
Camping at Yellowstone National Park is an example of
captive breeding
poaching
ecotourism
conservation efforts
Select the 3 examples of those who are at most in danger of extinction
small populations
large populations
species that migrate
species that stay in one place
species living in special habitats
All of the following human activities have influenced recent extinction events EXCEPT
Habitat Destruction
Introducing exotic/nonnative species
Poaching
CITES Treaty
______ species are ones that are not native to a particular region
Endemic
Endangered
Exotic
Ecological
why are exotic species considered a threat to ecosystems?
the ecosystems don't have enough space for them
their behaviors are different than those that already exist
they bring in different energy sources into the food web
native species have no natural defense against them
______ species are ones that are native to a particular place and that are found only there.
Endemic
Endangered
Exotic
Ecological
(a) is the illegal harvesting of fish, game, or other species.
A place is considered a biodiversity hotspot if it
has a high number of endemic species
is threatened by humans
all of the above
none of the above
Select the 3 kinds of environments that you can find most critical biodiversity hotspots
Deserts
Tropical rainforests
Coastal areas
Islands
Tundras
Where are some of the unique ecosystems of the United States?
Florida Everglades
Pacific Northwest Forests
Hawaii
California Coastal Regions
All of the above
_______ breeding is when species are bred in captivity with hopes of reintroducing the population into the wild.
Selective
Artificial
Captive
Cross
What is the challenge with trying to save individual species?
captive breeding may not be able to reproduce in the wild
inbreeding may result in less genetic defects
small populations are less prone
none of the above
What is the benefit to preserving an entire ecosystem rather than individual species?
only endangered species will be saved
developers will have greater access to land
more than one species can be saved
it will not be necessary for environmentalists to study the ecosystem
The CITES treaty reduced the slaughter of elephants by banning worldwide imports and exports of all (a) .
