FIGURE 1

Question 1: This graph shows…
  1. How climate changes can affect the ecosystem
  2. How human disturbances can improve the quality of an ecosystem
  3. That human disturbances can negatively affect the balance of an ecosystem
  4. 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…
  1. Introduction of invasive species
  2. Introduction of a natural predator for elephants
  3. The ivory trade ban
  4. Favorable weather conditions which allowed elephants to reproduce more quickly

FIGURE 2

Question 3: The increase of the rabbit population between points B and D is most likely due to…
  1. The introduction of an invasive species
  2. Decreased competition between the rabbit population
  3. Decreased competition between the rabbit and fox population
  4. The decline in the fox population
/ Question 4: The rabbit and the fox have what type of interaction?
  1. Mutualism
  2. Predation
  3. Parasitism
  4. Competition

FIGURE 3

In the graphs below, P.aureliaand 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…
  1. How P.aureliaand P. caudatum compete for resources
  2. The carrying capacity of P.aureliaand P. caudatum when grown together
  3. That the carrying capacity of P.aureliais higher than that of P. caudatum
  4. The population of P.aureliahas grown beyond its carrying capacity
/ Question 6: Graph B best displays…
  1. That P.aureliapreys on P. caudatum
  2. That both P.aureliaand P. caudatum can be grown together in the same medium
  3. Both P.aureliaand P. caudatum reach their carrying capacity when grown together
  4. P.aureliaoutcompetes P. caudatum

FIGURE 4

Question 7: Which of the following is TRUE about Pyramid X
  1. Blue jays have a bigger biomass than caterpillars
  2. Caterpillars have a biomass of 11,000 g/m2
  3. Hawks have the least number of organisms
  4. Oak trees have the most biomass
/ Question 8: Which of the following is FALSE about Pyramid Y
  1. Zooplankton have more biomass than phytoplankton
  2. Phytoplankton have a biomass of 40 g/m2
  3. Herons and phytoplankton have the same amount of biomass
  4. Perches have a biomass of 100 g/m2

FIGURE 5

Question 9: Which of the following is TRUE about Pyramid A
  1. There are more hawks than there are blue jays
  2. Caterpillars have the most biomass
  3. Hawks have the least number of organisms
  4. Oak trees have the most biomass
/ Question 10: Which of the following is FALSE about Pyramid B
  1. There are less caterpillars than there are oak leaves
  2. Hawks are the least in number in this ecosystem
  3. Pyramid B has the same number of hawks, blue jays, and caterpillars as Pyramid A
  4. Oak leaves have the most biomass

FIGURE 6

Question 11: Oak tree leaves have the most amount of energy because
  1. Oak tree leaves have the most biomass
  2. They are producers and they generate their own energy from the sun’s energy to create chemical energy
  3. Oak trees feed off of caterpillars
  4. They consume the sun
/ Question 12: Which of the following is FALSE?
  1. Hawks receive 24 kcal of energy
  2. Hawks receive the least amount of energy
  3. There is less energy as you move up the trophic levels because there are less organisms in the top trophic levels
  4. Energy is lost due to heat

FIGURE 7

Question 13: During which year the did the mice population stop growing?
  1. 1970
  2. 1980
  3. 1990
  4. 2000
/ Question 14: Why did the snake population stop growing after 1980?
  1. Snakes encountered their own predators after 1980
  2. Snakes eventually reached their carrying capacity
  3. Too many mice were born after 1980
  4. Too little mice were born after 1980

FIGURE 8

Question 15: Which of the following is TRUE about the graph?
  1. This population reached carrying capacity on July
  2. This population of rabbits grew beyond its carrying capacity
  3. This population reached its carrying capacity on May 1st
  4. This population displays exponential growth
/ Question 16: The carrying capacity of this population of rabbits is most likely
  1. 55
  2. 60
  3. 65
  4. 70

FIGURE 9

Question 17: What is NOT occurring in the graph above?
  1. The population of this organism is growing during summer and autumn
  2. This population is not growing during winter and spring
  3. The carrying capacity of this population appears to fluctuate between seasons
  4. 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?
  1. Carrying capacity can change as seasons change
  2. Seasons can change the amount of resources available to a population
  3. In this population, there is less reproduction and possibly less resources in the winter
  4. 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?
  1. The vegetation population declined due to an uncontrolled deer population growth
  2. The deer population grew beyond its carrying capacity
  3. The deer population crashed due to the decrease in the vegetation population
  4. All of the above
/ Question 20: What is the importance of carrying capacity?
  1. Carrying capacity is a measure of the amount of resources available in an environment
  2. Growing beyond the carrying capacity could lead to a population crash
  3. Carrying capacity is the average number of individuals in an ecosystem
  4. Carrying capacity is a measure of the health of an ecosystem