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WorksheetsBiodiversity Test Review
Total questions: 20
Worksheet time: 10mins
Earths various organisms appear to be
mostly small vertebrates
large known to scientists
concentrated in certain biomes
evolving at an unprecedented rate
The level of biodiversity that involves a variety of habits and communities is
ecosystem diversity.
genetic diversity.
population diversity
species diversity
Because of the Endangered Species Act, the sale of protected animals or plants is
punishable by a substantial fine
subject to approval by a Species Review Board
limited to quotas set for each species.
allowed for threatened but not endangered species.
What level of biodiversity is most commonly equated with the overall concept of biodiversity?
genetic diversity
ecosystem diversity
species diversity
All of the above
What groups of organisms are most in danger of extinction?
those with small populations
those that migrate or need special habitats
those with large populations that breed quickly
Both (a) and (b
Why is biodiversity important to ecosystems?
It allows animals to feed permanently from one type of plant
It increases at each level of the food chain
It helps populations adapt to ecological changes.
It reduces the number of insects in a given ecosystem.
The major human causes of extinction today are
hunting and destroying habitats.
polluting and introducing non-native species.
Both (a) and (b)
Neither (a) nor (b)
Which areas of the United States represent ecosystems with high levels of biodiversity?
coastal California
Florida Everglades
Hawaiian Islands
All of the above
Where are many critical biodiversity hotspots located?
cities and developed areas of the world
islands, tropical rain forests, and coastal areas
desert and polar environments
All of the above
Reasons for preserving biodiversity include all of the following except
increasing the chances of discovering organisms with medicinal value
isolating unique genetic material so it can be incorporated into existing crops
preventing natural evolution.
finding new plants that can supplement the world's food supply.
The current rate of species extinction is
slower than at any other time in this century
attributable to the actions of humans.
the result of natural environmental processes
of little consequence to Earth's long-term survival.
An endangered species is
a species in danger of extinction.
a species growing on public land.
an organism brought to a placed where it has not lived before.
a species that has disappeared entirely.
What is the difference between biotic and abiotic?
Biotic are non-living things
Biotic is life, Abiotic is non-living
Abiotic are living organisms
Biotic is non-living, Abiotic is living
Which represents an example of a limited biotic resource?
low oxygen levels in a pond can affect fish populations
fungi destroying the fruit of a banana tree of which insects feed on
Which represents an example of a limited abiotic resource?
low oxygen levels in a pond can affect fish populations
fungi destroying the fruit of a banana tree of which insects feed on
How many species are estimated to be living on Earth?
between 10,000 to 100,000
Between 500,000 to 1 million
between 1 to 2 million
between 10 million to 50 million
Which of the following would be most effective in slowing the loss of biodiversity?
required every country to maintain a seed bank
creating large parks/preserves in biodiversity hotspots
setting aside small plots of land in a variety of ecosystems, such as forest, grassland, and marshes
freezing fertilized eggs of endangered animals.
In what part of the world are the greatest number of extinction occurring?
in tropical rain forests
in deserts
in the Arctic
The United States laws that protect endangered species
are much weaker
are considered to be the strongest in the world
are rarely enforced
are much weaker
According to biologists, what percentage of species have species have become or are expected to become extinct between 1900 to 2100
1 percent
25 percent
10 percent
65 percent
