Question

complete the table to describe the interactions.
interaction effect on species a effect on species b
predation
herbivory positive
parasitism negative
commensalism positive
mutualism positive
competition negative

Explanation:

In predation, the predator (Species A) benefits (positive effect) by getting food from the prey (Species B) which has a negative effect as it is killed or harmed. In herbivory, the herbivore (Species A) benefits by consuming plants (Species B) which is negative for the plants. In parasitism, the parasite (Species A) benefits at the expense of the host (Species B) which is negatively affected. In commensalism, one species (Species A) benefits while the other (Species B) is neither helped nor harmed (neutral). In mutualism, both species (A and B) benefit. In competition, both species are negatively affected as they compete for resources.

Answer:

Interaction	Effect on Species A	Effect on Species B
herbivory	positive	negative
parasitism	positive	negative
commensalism	positive	neutral
mutualism	positive	positive
competition	negative	negative