Ecology Test

The diagrams below show a marine food web and an incomplete terrestrial food web. The organism in the terrestrial food web that corresponds to the krill in the marine food web is labeled X. Which of the following organisms is most likely organism X?

• Mouse

• Oak Tree

• Hawk

• Fox

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

Some organisms cause decay by breaking down dead matter into raw nutrients. These organisms are best described as:

• consumers

• decomposers

• producers

• carnivores

A food web can be best described as:

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Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

Part of a tundra food web is shown below. Which of the following describes the relationship between the sedge and the arctic hare?

• competition

• host-parasite

• mutualism

• producer-consumer

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

A graph of atmospheric carbon dioxide concentration over time is shown below. Scientists are investigating the cause of the large increase in atmospheric carbon dioxide concentrations since about 1800. Which of the following provides the best explanation for the increase?

• eruptions of large volcanos

• use of fossil fuels by humans

• natural fluctuations of the climate

• photosynthesis

Tags

NGSS.MS-ESS3-4

The population size that an environment can sustain is known as its

• density

• carrying capacity

• exponential growth

• dispersion

In 1999 a Canadian moose population had 12 members. Later that year, a new hunting camp was opened four miles from their habitat. In the spring of 2000, 3 babies were born, but 6 moose total had died that year. What was the rate (r) of population growth for 2000?

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Answer explanation

the answer is -3

The graph at right best demonstrates which type of population growth?

• logistic

• exponential

• strategic

• poor

Tags

NGSS.HS-LS2-1

NGSS.HS-LS2-2

What is the carrying capacity of wolves in this particular population?

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Answer explanation

the correct answer is 30

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Using the chart to make a prediction, what do you think would happen to the wolf population in the next 5 years?

• it would decline until the population reached 0

• it would increase slowly as the deer population continued to increase into 2009

• it would rapidly rise until all the deer were gone

• none of the above

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4