AnswersVA-Ecology -CRPR 26-27 MC S1Freshwater and Marine Biomes

Determining Population Size Answers

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1
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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.
2
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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.
3

Yellowstone National Park has an average of about 4500 bison living in it. The park covers 3472 square miles. What is the population density of bison living in Yellowstone?

Question illustration
A
1.3 bison/mi
B
16 bison/mi
C
77 bison/mi
D
0.77 bison/mi
4

For which method of determining population size is the population not aware of the sampler’s presence?

A
mark/recapture
B
direct observation
C
sampling
D
indirect observation
5

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
6

Which is not a difference between a population showing exponential growth and a population showing logistic growth?

A
food limits
B
disease limits
C
carrying capacity
D
mutation rate
7

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
8

Which of the following is a density-independent factor?

A
disease
B
predation
C
natural disasters
D
stress
9

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

The three methods for determining population size are observation, mark and recapture, and sampling.

A
T
B
F

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