Quiz 5
No class on Friday, so at least you got
that going for you, which is nice
Question 1
There are 80 swamp sparrows in a 20-hectare
section of Mount Meadow. The average
population density of sparrows at this site is
_______ per hectare.
a. 2
b. 4
c. 20
d. 80
e. 160
Question 2
Adult monarch butterflies overwinter
a. wherever milkweed plants are abundant.
b. in oyamel fir forests in Mexico.
c. in the Everglades in Florida.
d. in Dorset heathlands.
e. in southern California.
Question 3
In some trees and shrubs, competition among
seedlings causes individuals to be spaced
relatively evenly throughout the habitat. These
plants exhibit a _______ type of dispersion
pattern.
a. regular
b. ramet
c. clumped
d. random
e. None of the above
Question 4
As of 2010, the human population was just
under
a. 7 million.
b. 70 million.
c. 3 billion.
d. 7 billion.
e. 30 billion.
Question 5
Which of the following types of survivorship curves
is seen most frequently for invertebrates?
a. Type I (most individuals survive to old age)
b. Type II (constant rate of mortality throughout
lifetime)
c. Type III (most individuals die young)
d. Type I and Type II are about equally common.
e. Type II and Type III are about equally common.
Question 6
The country of Guatemala is currently experiencing
rapid population growth, Greece is experiencing
essentially zero population growth, and Germany is
experiencing negative population growth. Assuming
that age-specific fecundities are similar in these
three countries, which of the following is most likely?
a. The proportion of young individuals should be higher
in Germany than in Greece.
b. The proportion of elderly individuals should be
higher in Greece than in Germany.
c. Guatemala should have the highest proportion of
young individuals.
d. Both a and b
e. Both b and c
Question 7
Which of the following populations would be
expected to remain stable in size?
a. A population one with an r of 1
b. A population with a  of 1
c. A population with an r of 0
d. Both a and b
e. Both b and c
Question 8
Which of the following statements about
population fluctuations is true?
a. Population fluctuations can be caused by changes
in density-dependent factors.
b. Population fluctuations can be caused by changes
in density-independent factors.
c. All natural populations fluctuate in size.
d. All of the above are true
e. None of the above are true
Question 9
According to May’s model, a population that experiences
delayed density dependence can exhibit logistic growth
or dampened oscillations, or it can fluctuate forever in
a stable limit cycle. Which two factors determine the
pattern that will result?
a. The population growth rate under ideal conditions and
the starting population size
b. The population growth rate and the time lag
c. The starting population size and the time lag
d. The time lag and the degree of demographic
stochasticity
e. The time lag and the carrying capacity
Question 10
Assuming that their average population growth rates and
all other factors are equal, which of the following
populations would most likely be at risk for extinction?
a. A large population with low variation in its growth rate
b. A large population with high variation in its growth rate
c. A small population with low variation in its growth rate
d. A small population with high variation in its growth
rate
e. All have equal risk; population size and variation in
population growth rate do not influence extinction risk.