SAT Subject Biology Practice Question 65: Answer and Explanation
4. Which of these relationships results in harm to one of the species involved?
A. I only
B. III only
C. I and II
D. II and III
E. I, II, and III
Correct Answer: D
Predation and herbivory, along with parasitism, result in harm to one of the species involved. Commensalism benefits one species while leaving the other largely unaffected.