ECCB 403 EXAM 2 QUESTIONS WITH
VERIFIED ANSWERS. A+ GRADE
2025/2026.
When an individual of one animal species kills (and may eat) an individual of a second animal
species, this is defined as - ANS Predation
Which of the following are among the most important findings of the "classical" laboratory
experiments on predator-prey systems? - ANS Predators and prey usually established stable
population oscillations
Which growth form is not a result of a predator-prey model based on the Lotka-Volterra
predator-prey equations? - ANS Overshoot and collapse
In the Lotka-Volterra predator prey equations, the k3 term represents - ANS Per capita
mortality rate of predators in the absence of prey
In the Lotka-Volterra predator prey equations, the k 2 term represents, - ANS Ability of
predators to convert prey into more predators
Among the types of functional responses of predators to changes in prey abundance are -
ANS Type I and Type III Response
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, Among the types of numerical responses of predators to changes in prey abundance are -
ANS Aggregative response
Evolutionary change in two or more interacting species is called - ANS co evolution
1) The mathematical representations of predator-prey interactions that we presented in class
are shown in: - ANS b and c
they start off with dH/dT and dP/dT
(look for H and P)
Consider the graph below of woodland caribou population growth rates observed at various
population sizes. How does this graph contradict the basic theory of density-dependent
population growth - ANS a. As population size increases, the population growth rate should
decrease
1) Consider the graph above of woodland caribou population growth rates observed at various
population sizes. What does this graph demonstrate? - ANS Allee effect
What does the graph below represent - ANS a. Stable predator-prey cycles
b. Time lags between changes in prey density and changes in predator density
c. The four phases in the predator-prey cycle
d. All the above
What does the graph below represent - ANS a. Sigmoid population growth
b. An aggregated pattern of dispersion
c. Predator "switching" to alternative prey as a function of relative prey abundance
d. All the above
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
VERIFIED ANSWERS. A+ GRADE
2025/2026.
When an individual of one animal species kills (and may eat) an individual of a second animal
species, this is defined as - ANS Predation
Which of the following are among the most important findings of the "classical" laboratory
experiments on predator-prey systems? - ANS Predators and prey usually established stable
population oscillations
Which growth form is not a result of a predator-prey model based on the Lotka-Volterra
predator-prey equations? - ANS Overshoot and collapse
In the Lotka-Volterra predator prey equations, the k3 term represents - ANS Per capita
mortality rate of predators in the absence of prey
In the Lotka-Volterra predator prey equations, the k 2 term represents, - ANS Ability of
predators to convert prey into more predators
Among the types of functional responses of predators to changes in prey abundance are -
ANS Type I and Type III Response
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, Among the types of numerical responses of predators to changes in prey abundance are -
ANS Aggregative response
Evolutionary change in two or more interacting species is called - ANS co evolution
1) The mathematical representations of predator-prey interactions that we presented in class
are shown in: - ANS b and c
they start off with dH/dT and dP/dT
(look for H and P)
Consider the graph below of woodland caribou population growth rates observed at various
population sizes. How does this graph contradict the basic theory of density-dependent
population growth - ANS a. As population size increases, the population growth rate should
decrease
1) Consider the graph above of woodland caribou population growth rates observed at various
population sizes. What does this graph demonstrate? - ANS Allee effect
What does the graph below represent - ANS a. Stable predator-prey cycles
b. Time lags between changes in prey density and changes in predator density
c. The four phases in the predator-prey cycle
d. All the above
What does the graph below represent - ANS a. Sigmoid population growth
b. An aggregated pattern of dispersion
c. Predator "switching" to alternative prey as a function of relative prey abundance
d. All the above
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
