Unit 6 Mini Quiz

.  Borrelia burgdorferri, a bacteria carried by the deer tick, produces Lyme disease in humans as well as dogs and cattle.  As the deer population increases in Northern Virginia, it is likely that -

 

 

• there will be more reported cases of Lyme disease among humans in the area

   

• the percentage of deer that carry B. burgdorferri will also increase

• the number of ticks with Lyme disease will increase as well

   

• . the population of deer will be reduced as a result of Lyme disease

   

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Which of the following conditions may result in an increase in a specific deer population? 

• A. A longer hunting season

• B. A warm winter with little snow or ice

• C. Cutting down trees for wood

• D. Very little rain

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Which of these could cause a decrease in the number of birds in a population?

• An increase in cooperation with owls in the area

• An increase in the birds territory

• An increase in competition with other nut-eating animals

• An increase in the birds' food supply

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The graph below shows changes in a caribou population over time.

Based on the graph, which of the following is a possible explanation for the stabilization of the caribou population?

Stabilization = A population has stabilized when the number of births has come into balance with the number of deaths

• An equal number of deaths and births

• An unequal number of deaths and births

• An equal number of immigrants and births

• An unequal number of immigrants and deaths

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Zebra mussels, an invasive species of mollusk, were found in a Prince William Pond.

    Area naturalists should be least concerned about the zebra mussels’ ability to -

• crowd out native species of mollusks

• eat all of the plant life in the pond

• eat all of the plant life in the pond

• alter the diversity of organisms in the area

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Which of the following is the most likely conclusion about the interaction of these two populations?

Lemmings are small mammals that experience a population explosion about once every four years.  Snowy owls eat lemmings.

 

• The lemming population decreases while the snowy owl population increases.

• The lemming population and snowy owl population do not impact one another.

• The snowy owl population and the lemming population show similar changes.

• The population of lemmings is less than the population of snowy owls.

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The northern oyster populations in the Chesapeake Bay cannot keep up with consumer demand for them.

There are not enough oystersA. Asian and eastern oysters might crossmate and for all the people that want to eat them.

As a result, local officials are considering seeding(introducing) the Bay with an Asian species.

• Asian and northern oysters might crossmate and produce a new species.

  (crossmate = reproduce and make more oysters)

• Asian oysters may taste better than northern oysters to potential consumers.

• Asian oysters are a foreign (invasive) species and may crowd out the northern oysters

  crowd out = take over

• Asian oysters may be resistant to diseases carried by the northern oyster.

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