3. Population Ecology

Species Interactions — Quiz

Test your understanding of species interactions with 5 practice questions.

Practice Questions

Question 1

According to the Lotka–Volterra predator–prey model with $\frac{dN}{dt}=rN - aNP$ and $\frac{dP}{dt}=baNP - mP$, the non-zero equilibrium prey density is $N^*=\frac{m}{ba}$. If $r=0.5\,\mathrm{day}^{-1}$, $a=0.02\,\mathrm{predator}^{-1}\mathrm{day}^{-1}$, $b=0.1$, and $m=0.1\,\mathrm{day}^{-1}$, what is $N^*$?

Question 2

Character displacement, observed in sympatric species such as Darwin’s finches, results from:

Question 3

Which of the following interactions best exemplifies parasitoidism rather than classical parasitism?

Question 4

Which of the following is an example of obligate mutualism?

Question 5

Apparent competition between two prey species arises when: