AnswersEnvironmental Science ADetermining Population Size

Determining Population Size Answers

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1
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Tagging animals is indicative of which type of method to determine population size?

A
mark/recapture
B
direct observation
C
sampling
D
indirect observation
2
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Which of the following samples has the greatest population density?

Question illustration
A
125,000 organisms in 2.5 mi
B
13,000 organisms in 1.0 mi
C
150,000 organisms in 4.0 mi
D
100,000 organisms in 0.5 mi
3

Which of the following is a density-independent factor?

A
disease
B
predation
C
natural disasters
D
stress
4

A J-shaped curve is called a(n) _______.

A
logistic growth curve
B
exponential growth curve
C
linear growth curve
D
population growth curve
6

The formula to calculate population density is _______.

Question illustration
A
land area number of populations
B
number of populations land area
C
number of organisms in a region land area
D
land area number of organisms in a region
7

Which of the following methods involves counting the number of organisms in a specific area?

A
mark/recapture
B
direct observation
C
sampling
D
indirect observation
8

The equation total # of people in an area/(land) area in km2(or mi2) is used to calculate

A
growth rate
B
population density
C
death rate
D
carrying capacity
10

Which of the following statements about exponential growth curves is true?

A
Exponential growth curves are common for R-selected species.
B
Exponential growth curves show fast growth rates followed by slow growth rates.
C
No organisms in nature experience exponential growth rates.
D
Exponential growth curves are S-shaped.
11

What is the main difference between logistic and exponential growth curves?

A
Logistic growth curves never increase exponentially.
B
Logistic growth curves stabilize when carrying capacity is reached.
C
Logistic growth curves decrease before they increase.
D
Logistic growth curves are identical to exponential growth curves.
14

When tagging animals specifically for the study of population size, scientists must do all of the following EXCEPT:

A
tag all individuals during the first study to ensure accurate results
B
make sure that markings do not harm the animal
C
ensure that tags are non-toxic and will not come off of the animal
D
ensure that the location and color of the tag does not draw the attention of predators

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