lesson2 : Threats to Biodiversity

The natural gradual process of extinction is called :

• Mass extinction

• Background extinction

• Habitat fragmentation

• Biological magnification

How does pollution affect the biodiversity ?

• clearing of rainforest

• separate ecosystem into small pieces of land

• acid precipitation

• Eutrophication

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....... are species that has been transported to a new habitat

• nonnative species

• keystone species

The current rate of extinction is ......... the normal background extinction rate

• 1 time

• 10 times

• 1000 times

• 10000 times

Tags

NGSS.MS-LS4-1

1. What makes a species invasive?

• Moving to a new ecosystem and taking resources from natives 
• Not having papers
• Species that can't adapt
• Plants that take up too much space

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If a blue catfish is introduced and eats the large fish who eat the smaller fish, what will happen to the population of the smaller fish?

• Increase
• Decrease
• Stay the same
• No affect on smaller fish

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NGSS.MS-LS2-1

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How does habitat fragmentation reduce genetic diversity in species?

• Habitat fragmentation makes nonnative species introduction possible.

• Habitat fragmentation opens migration routes.

• Habitat fragmentation isolates a large population into smaller groups.

• Habitat fragementation encourages open gene flow.

Tags

NGSS.MS-LS4-4

The loss of a natural habitat is called?

• Habitat development
• biodiversity
• Pollution
• Habitat destruction

The loss of habitat

• pollution
• poaching
• habitat fragmentation
• habitat destruction

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the breaking of habitats into smaller pieces is called...

• habitat division

• habitat pollution

• habitat corruption

• habitat fragmentation

Tags

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