IB ESS Topic 3.3-3.4

In ESS class, Carly and Joselyn are discussing about the variety of genes present in a population of a species. What term do they use to describe this?

• biodiversity

• species diversity

• extinction

• genetic diversity

Tags

NGSS.MS-LS3-2

NGSS.MS-LS4-4

What is an invasive species?

• A native (naturally found) species which are added to an area. 
• A non-native (not naturally found) species that causes harm to the area it is introduced to.

• A keystone species in an environment
• none of the above

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NGSS.MS-LS2-5

NGSS.MS-LS2-4

NGSS.MS-LS2-2

Why do the populations of invasive species grow so quickly? 

• Invasive Species are native to an area. 
• Invasive species are prey to many animals.
• Invasive species have no predators.
• Invasive species keep the ecosystems in equilibrium.

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NGSS.MS-LS2-5

NGSS.MS-LS2-4

NGSS.MS-LS2-2

All of the following are factors that increase species vulnerability to extinction except

• Narrow geographic range

• Small population size

• High reproductive potential

• Low population densities

Tags

NGSS.HS-LS4-5

Why are island species more prone to extinction than other species?

• Their populations tend to be small

• Islands have a high incidence of endemic species

• Genetic diversity tends to be low

• Islands tend to be vulnerable to the introduction of invasive species

• All of the above are reasons why island species are especially vulnerable to extinction

An endangered species is

• One whose numbers are so small that it is at risk of extinction
  
• One whose not been spotted after many years.
• One whose numbers are abundant.

The primary causes of extinction (and endangerment and threatened status) is...

• polar ice cap melting

• global warming

• habitat loss and degradation

• burning of fossil fuels

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NGSS.MS-LS2-5

NGSS.MS-LS2-4

NGSS.MS-ESS3-4

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

• habitat division

• habitat pollution

• habitat corruption

• habitat fragmentation

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.

The practice of harvesting or hunting to such a degree that remaining individuals may not be able to replenish the population is called _____.

• biomagnification
• overexploitation
• edge effects
• natural resource

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1