Question

When Didinium and Paramecium are in same test tube, Didinium engulfs all the Paramecium and then die of starvation. Out of predator or competitor, what role does Didinium perform in this interaction?

Answer 1

Predators are organisms that use another organism as food. Here didinium consumed all the paramecium, therefore they are predators and paramecium are the prey. Competitors are organisms that are fighting for the same resources, such as food or space.