Which statement is true of new species?

They are evolving all over the world.

Which statement best explains why the region shown in this photograph has high biodiversity?

Abiotic factors change with elevation.

As a result of the activities shown in the photograph, biodiversity will most likely _________.

decrease because the natural vegetation has been destroyed

Why do high levels of endemism tend to occur on islands?

Island species can evolve isolated from other species.

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Biodiversity

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Test your knowledge of biodiversity!

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Questions 10

Answers

1
Which statement is true of new species?
They are unlikely to go extinct.
They are evolving all over the world.
They are threats to biodiversity.
They are genetically superior to older species.
2
Biodiversity is the variety of __________ in an ecosystem.
genes
species
habitats
individuals
3
Which kinds of species are most vulnerable to extinction?
Those with short life cycles.
Those with small populations.
Those with extensive habitats.
Those with high reproductive rates.
4
Biodiversity includes which of the following in an ecosystem?
all living things
only plants and animals
only rare and endangered species
all nonliving things
5
Which statement best explains why the region shown in this photograph has high biodiversity?
Species from other ecosystems move easily into this one.
Climate is more extreme in this area than in others.
Abiotic factors change with elevation.
Fewer predators live at higher altitudes.
6
A biodiversity hotspot contains __________ of its original vegetation.
none
less than 30%
more than 30%
all
7
As a result of the activities shown in the photograph, biodiversity will most likely _________.
disappear because the organisms there will become extinct
increase because crops were planted to replace the forest
stay the same because organisms will adapt to new conditions
decrease because the natural vegetation has been destroyed
8
Which of these processes most threatens biodiversity?
Earth's orbital cycles
evolution
predation
industrial agriculture
9
Which statement is true of extinction?
It happens at a constant rate.
It happens only during mass extinction events.
It is occurring all the time.
It occurs less frequently over time.
10
Why do high levels of endemism tend to occur on islands?
Introduced species can't compete with native island species.
Island species can evolve isolated from other species.
Most islands are mountainous and have several climate zones.
Island species' reproduction rates are comparatively high.

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