Assignment: Environmental Science

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Assignment: Environmental Science

A hot t, tropical grassland with scattered trees is a:

Savanna

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Tundra

Boreal forest

Desert

 

Permafrost is a defining characteristic of which biome?:

Steppe

Desert

Taiga

Tundra

 

The dominant plant type in temperate forest is:

Forbs

Coniferous trees

Deciduous trees

Succulents

 

The chaparral biome can be found in:

California

Australia

All answers are correct

The Mediterranean

 

 

Trees in the Boreal forest are adapted to conserve:

Carbon

Phosphorus

Nitrogen

Magnesium

 

 

What is an endemic species?

 

A species native to only one area

A species dying from an unknown disease

A robust group of organisms that dominate an ecosystem

A broad group of pollinating insects

 

Which of the following is a driver of species creation?

Climatic stability

All answers are drivers

Temporal stability

Habitat heterogeneity

 

Pollinator ecosystem services are provided by which organism?

Birds

All are pollinators

Bees

Bat

 

Why have scientists, farmers and politicians stored the world’s seed heritage on a remote island in the Arctic?

 

Consistent temperatures and humidity for seed survival.

If the facility’s climate control fails, the seeds will only freeze.

All of these answers are correct.

Polar bears and remoteness are great deterrents for terrorists.

 

 

 

Scientists consider which of the following an important aspect of “biodiversity”?

Ecosystems

Genes

Species

All are important

 

 

What percentage of the timber imported by the United States is potentially illegally harvested?

75%

50%

1%

10%

 

 

 

What is the present day extinction rate?

About 10 times faster than the background rate

About 100 times faster than the background rate

About equal to the background rate

About 1000 times faster than the background rate

 

 

 

What percentage of river lengths in the United States have been modified through damming and bank modification?

50%

20%

90%

10%

 

Which of the following statements is TRUE about extinction?

Extinction occurs when speciation rates increase dramatically

The only large extinction event was 65 million years ago when the dinosaurs were killed.

Extinction of more than half of the existing species on the planet has occurred roughly five times

Plants, but not animals, have been known to recover from extinction

 

Which of the following threats has had a large impact on biodiversity?

Overharvesting

All three are correct

Exotic species

Habitat loss

When an invasive species is introduced, what is the potential consequence of that introduction?

Increased predation on some native species

All of the listed consequences can occur

Extinction of economically important species

Reduced predation on some native species

 

The relationship between the populations of wild lynx and snowshoe hare is an example of what ecological interaction?

Birth rates dynamics

Nutrient cycling

Territorial dominance

Predator-prey interactions

 

 

Energy is _________ as you move up the trophic levels.

Lost

Gained

Created

Conserved

 

Where one species benefits from prolonged interaction with another species, while the other species neither benefits nor is harmed is called:

Parasitism

Commensalism

Mutualism

 

Advantagism

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