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Worksheets9.3_Loss of Biodiversity
Total questions: 23
Worksheet time: 16mins
This is the disappearance of a particular population from a given area, but not the entire species globally.
extinction
extirpation
evacuation
evaluation
This is the extinction of a species one by one, not a sudden loss of many species
background extinction
mass extinction
fragmentation
biotic potential
This classification of risk means that the species is at serious risk of extinction.
threatened
vulnerable
endangered
extinct
The status of a "threatened species" means:
they are almost extinct
they are likely to become endangered
they are extinct
their numbers are increasing
All of the following are causes for biodiversity loss, EXCEPT:
Habitat Loss
Invasive Species
Replanting trees
Pollution
Forest clearing, farming, and road building are all examples of
Biodiversity
Population distribution
Habitat loss
Climate Change
All of the following describe habitat fragmentation, EXCEPT:
Gaps form within a habitat
Patches of suitable habitat are surrounded by unsuitable habitat
Often a result of habitat loss
Increases the number of species
The greatest cause of biodiversity loss today is
Pollution
Habitat loss and change
Climate Change
Invasive species
All of the following affect biodiversity only in certain locations and times, EXCEPT:
Pollution
Invasive Species
Climate Change
Overharvesting
the variety of life in the world or in a particular habitat or ecosystem
biodiversity
demography
carrying capacity
poaching
a species that is not native to a particular region
endemic
exotic
endangered
extinct
species that are native to and found only within a limited area
endemic
exotic
endangered
extinct
In what part of the world are the greatest number of extinctions occurring?
in deserts
in the Arctic
in tropical rain forests
The level of biodiversity that involves a variety of habits and communities is _____ diversity.
ecosystem
population
genetic
species
What level of biodiversity is most commonly equated with the overall concept of biodiversity?
genetic
ecosystem
species
Why is biodiversity important to ecosystems?
It helps populations adapt to ecological changes.
It increases at each level of the food chain.
Where are many critical biodiversity hotspots located?
islands, tropical rain forests, and coastal areas
cities and developed areas of the world
Biodiversity is important to keep an area (biome) healthy. In this example "Food Web A" is sustainable. Why is sustainability important for an ecosystem in "Food Web A".
If one organism is removed the food web can still operate (work) with little or no negative effect.
If an organism is removed the food web will collapse and will affect the environment.
Food Web B is an example of...
Low biodiversity and low sustainability. If the producer dies then all the food web will suffer.
High biodiversity and high sustainability. If an organism is removed the food web will continue with no effect.
The lionfish is a venomous fish found primarily in the Red Sea and the Indian Ocean. In the 1990s, lionfish were accidentally released into the Atlantic Ocean, where they found abundant resources and favorable environmental conditions. Which of the following scenarios is most likely to result in the lionfish having a major impact on the communities into which they were introduced?
With no natural predators, the lionfish population will become very large.
Some native species of invertebrates will develop a resistance to lionfish venom.
Which habitat exhibits the greatest biodiversity?
A habitat with 15 different species with about 300 individuals each
A habitat with 10 different species with about 75 individuals each
