FIGURE 1
Question 1: This graph shows…
A. How climate changes can affect the
ecosystem
B. How human disturbances can improve
the quality of an ecosystem
C. That human disturbances can negatively
affect the balance of an ecosystem
D. The decrease in the elephant population
in the 1970s occurred because the
elephants reached carrying capacity
Question 2: The increase of the elephant
population in the 1980s is due to…
A. Introduction of invasive species
B. Introduction of a natural predator for
elephants
C. The ivory trade ban
D. Favorable weather conditions which
allowed elephants to reproduce more
quickly
FIGURE 2
Question 3: The increase of the rabbit population Question 4: The rabbit and the fox have what
between points B and D is most likely due to…
type of interaction?
A. The introduction of an invasive species
A. Mutualism
B. Decreased competition between the rabbit
B. Predation
population
C. Parasitism
C. Decreased competition between the rabbit
D. Competition
and fox population
D. The decline in the fox population
FIGURE 3
In the graphs below, P. aurelia and P. caudatum are two different bacteria species. Graph A
shows the population growth of each species when grown separately. Graph B shows the
population growth of each species when grown together.
Question 5: Graph A best displays…
A. How P. aurelia and P. caudatum compete for
resources
B. The carrying capacity of P. aurelia and P.
caudatum when grown together
C. That the carrying capacity of P. aurelia is
higher than that of P. caudatum
D. The population of P. aurelia has grown beyond
its carrying capacity
Question 6: Graph B best displays…
A. That P. aurelia preys on P. caudatum
B. That both P. aurelia and P. caudatum can
be grown together in the same medium
C. Both P. aurelia and P. caudatum reach
their carrying capacity when grown
together
D. P. aurelia outcompetes P. caudatum
FIGURE 4
Question 7: Which of the following is TRUE about
Pyramid X
A. Blue jays have a bigger biomass than
caterpillars
B. Caterpillars have a biomass of 11,000 g/m2
C. Hawks have the least number of organisms
D. Oak trees have the most biomass
Question 8: Which of the following is FALSE
about Pyramid Y
A. Zooplankton have more biomass than
phytoplankton
B. Phytoplankton have a biomass of 40 g/m2
C. Herons and phytoplankton have the same
amount of biomass
D. Perches have a biomass of 100 g/m2
FIGURE 5
Question 9: Which of the following is TRUE about
Pyramid A
A. There are more hawks than there are blue jays
B. Caterpillars have the most biomass
C. Hawks have the least number of organisms
D. Oak trees have the most biomass
Question 10: Which of the following is FALSE
about Pyramid B
A. There are less caterpillars than there are
oak leaves
B. Hawks are the least in number in this
ecosystem
C. Pyramid B has the same number of hawks,
blue jays, and caterpillars as Pyramid A
D. Oak leaves have the most biomass
FIGURE 6
Question 11: Oak tree leaves have the most amount
of energy because
A. Oak tree leaves have the most biomass
B. They are producers and they generate their
own energy from the sun’s energy to create
chemical energy
C. Oak trees feed off of caterpillars
D. They consume the sun
Question 12: Which of the following is FALSE?
A. Hawks receive 24 kcal of energy
B. Hawks receive the least amount of energy
C. There is less energy as you move up the
trophic levels because there are less
organisms in the top trophic levels
D. Energy is lost due to heat
FIGURE 7
Question 13: During which year the did the mice
population stop growing?
A. 1970
B. 1980
C. 1990
D. 2000
Question 14: Why did the snake population stop
growing after 1980?
A. Snakes encountered their own predators
after 1980
B. Snakes eventually reached their carrying
capacity
C. Too many mice were born after 1980
D. Too little mice were born after 1980
FIGURE 8
Question 15: Which of the following is TRUE about
the graph?
A. This population reached carrying capacity on
July
B. This population of rabbits grew beyond its
carrying capacity
C. This population reached its carrying capacity
on May 1st
D. This population displays exponential growth
Question 16: The carrying capacity of this
population of rabbits is most likely
A. 55
B. 60
C. 65
D. 70
FIGURE 9
Question 17: What is NOT occurring in the graph
above?
A. The population of this organism is growing
during summer and autumn
B. This population is not growing during winter
and spring
C. The carrying capacity of this population
appears to fluctuate between seasons
D. This population reaches eventually reaches
carrying capacity
Question 18: Which of the following statements
are NOT TRUE according to the graph and the
explanation above?
A. Carrying capacity can change as seasons
change
B. Seasons can change the amount of
resources available to a population
C. In this population, there is less
reproduction and possibly less resources in
the winter
D. Seasons do not affect the growth or
carrying capacity of a population
FIGURE 10
Question 19: What happened after deer was
introduced into this ecosystem?
A. The vegetation population declined due to an
uncontrolled deer population growth
B. The deer population grew beyond its carrying
capacity
C. The deer population crashed due to the
decrease in the vegetation population
D. All of the above
Question 20: What is the importance of carrying
capacity?
A. Carrying capacity is a measure of the
amount of resources available in an
environment
B. Growing beyond the carrying capacity
could lead to a population crash
C. Carrying capacity is the average number of
individuals in an ecosystem
D. Carrying capacity is a measure of the
health of an ecosystem