# Population Studies And Interaction Among Living Things Quiz

38 Questions | Total Attempts: 145  Settings  • 1.
All of the following are examples of limiting factors for populations except:
• A.

Space

• B.

Food

• C.

Emigration

• D.

Weather

• 2.
Ecologists use the birth and death rates to calculate a population's growth rate, the rate the population is changing. The birth rate (b) minus the death rate (d) equals the growth rate (g). So, B-D=G  Based on this formula: a population of rabbits with an average of 760 births and 227 deaths has a growth rate of _________ per year:
• A.

533 rabbits

• B.

233 rabbits

• C.

227 rabbits

• D.

987 rabbits

• 3.
Use the graph to answer the questions about the changes in squirrel population. Which year did the squirrel population decrease the most?
• A.

1994

• B.

1996

• C.

1999

• D.

1997

• 4.
Use the graph to answer the question about changes in the squirrel population. Over which time period(s) did the population increase?
• A.

From 1994-1997

• B.

From 1992-1994

• C.

From 1994-1996

• D.

From 1997-1999

• 5.
Use the graph to answer the changes in squirrel population questions. What was the size of the population the year the number of squirrels reached its lowest point?
• A.

200 squirrels

• B.

2 squirrels

• C.

3 squirrels

• D.

300 squirrels

• 6.
Counting all the members of a ___________ is a method of __________________.
• A.

Population and direct observation

• B.

Birth rate and population

• C.

Population and indirect observation

• D.

Death rate and population density

• 7.
Counting fiddler crab holes on the tidal flats on an island is a _____________________ method of determining fiddler crabs populations.
• A.

Direct observation

• B.

Limiting factor

• C.

Birth rate

• D.

Population

• E.

Indirect observation

• F.

Death rate

• G.

Population density

• H.

Carrying capacity

• I.

Estimate

• J.

Emigration

• K.

Ecology

• L.

Mark and recapture

• M.

Immigration

• N.

Space

• O.

Food

• P.

Sample

• Q.

Weather

• R.

Water

• 8.
An starfish grouping is 10 meters long and 5 meters wide. In a 1 square meter area you count 20 starfish.  Estimate the population of starfish in the grouping.
• A.

100

• B.

100,000

• C.

1,000

• D.

10,000

• 9.
Check the conditions that can limit the growth of a population:
• A.

Temperature and rainfall

• B.

Seasons and rainfall

• C.

Rainfall and humidity

• D.

Weather and seasons

• 10.
What is the population density of the flamingos in the pond?
• A.

2.5 flamingoes per square meter

• B.

2 flamingoes per square meter

• C.

4 flamingoes per square meter

• D.

2.25 flamingoes per square meter

• 11.
What is a producer?
• A.

An organism that makes its own food energy.

• B.

An organism that needs to consume other organisms to get energy.

• C.

An organism that gets its energy from dead or decaying matter.

• D.

An organism that lives off the food energy of another organism.

• 12.
Identify this method of estimating populations:  Red wolves are tagged, released and checked systematically.
• A.

Direct observation

• B.

Limiting factor

• C.

Birth rate

• D.

Population

• E.

Indirect observation

• F.

Death rate

• G.

Population density

• H.

Carrying capacity

• I.

Estimate

• J.

Emigration

• K.

Ecology

• L.

Mark and recapture

• M.

Immigration

• N.

Space

• O.

Food

• P.

Sample

• Q.

Weather

• R.

Water

• 13.
In general, which is a true statement about population size:
• A.

If birth rate < death rate, population size increases

• B.

If death rate < birth rate, population size decreases

• C.

If birth rate > death rate, population size increases

• D.

If death rate > birth rate, population size increases

• 14.
What does the basic formula for mark and recapture mean?
• A.

The population sample equals the number marked multiplied by the sum of the unmarked and recaptured divided by the number recaptured

• B.

The population sample equals the number marked minus the sum of the unmarked and recaptured divided by the number recaptured.

• C.

The population sample equals the number marked divided by the number recaptured

• D.

The population sample equals the number unmarked plus the recaptured divided by the number recaptured

• 15.
When might an ecologist use indirect observation to estimate a population?
• A.

Indirect observation may be used when a population is small or difficult to find.

• B.

Indirect observation may be used when a population is located in a remote area that the scientist cannot get to.

• C.

Indirect observation may be used to mark and recapture organisms.

• D.

Indirect observation may be used for sampling.

• 16.
Suppose a population of 50 mice has produced 175 young. If 159 mice died, how many mice are now in the population?  (Assume for this question that no mice have moved into or out of the population for other reasons).
• A.

There would be a population of 66 mice.

• B.

There would be a population of 225 mice.

• C.

There would be a population of 116 mice.

• D.

There would be a population of 125 mice.

• 17.
One method of estimating population size is to count the number of organisms in a small area _________ and then apply multiples of that area to the larger area.
• A.

Direct observation

• B.

Limiting factor

• C.

Birth rate

• D.

Population

• E.

Indirect observation

• F.

Death rate

• G.

Population density

• H.

Carrying capacity

• I.

Estimate

• J.

Emigration

• K.

Ecology

• L.

Mark and recapture

• M.

Immigration

• N.

Space

• O.

Food

• P.

Sample

• Q.

Weather

• R.

Water

• 18.
What does a negative growth rate mean?
• A.

The population is declining.

• B.

The population will remain the same.

• C.

The population will increase.

• D.

The population is endangered.

• 19.
A mouse, raccoon and hawk are all members of the same:
• A.

Species

• B.

Niche

• C.

Community

• D.

Population

• 20.
All of the following are examples of limiting factors except:
• A.

Time

• B.

Food & water

• C.

Space

• D.

Weather

• 21.
Population can change in size when:
• A.

The birth rate equals the death rate

• B.

Emigration rate equals birth rate

• C.

When new members join the population or when members leave the population

• D.

None of these

• 22.
What is a sampling estimate?
• A.

A sampling estimate is an approximation of a number based on reasonable assumptions.

• B.

The practice of mark and recapture.

• C.

Uses mathematical formulas to estimate the total population.

• D.

A direct count of the organisms in a population.

• 23.
The largest population that an area can support is called:
• A.

Direct observation

• B.

Limiting factor

• C.

Birth rate

• D.

Population

• E.

Indirect observation

• F.

Death rate

• G.

Population density

• H.

Carrying capacity

• I.

Estimate

• J.

Emigration

• K.

Ecology

• L.

Mark and recapture

• M.

Immigration

• N.

Space

• O.

Food

• P.

Sample

• Q.

Weather

• R.

Water

• 24.
The number of individuals in an area of a specific size:
• A.

Direct observation

• B.

Limiting factor

• C.

Birth rate

• D.

Population

• E.

Indirect observation

• F.

Death rate

• G.

Population density

• H.

Carrying capacity

• I.

Estimate

• J.

Emigration

• K.

Ecology

• L.

Mark and recapture

• M.

Immigration

• N.

Space

• O.

Food

• P.

Sample

• Q.

Weather

• R.

Water

• 25.
When groups leave or are separated from their organism population to pursue a need, it is called:
• A.

Direct observation

• B.

Limiting factor

• C.

Birth rate

• D.

Population

• E.

Indirect observation

• F.

Death rate

• G.

Population density

• H.

Carrying capacity

• I.

Estimate

• J.

Emigration

• K.

Ecology

• L.

Mark and recapture

• M.

Immigration

• N.

Space

• O.

Food

• P.

Sample

• Q.

Weather

• R.

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