Question

When Didinium and Paramecium are in same test tube, Didinium engulfs all the Paramecium and then die of starvation. Didinium is the _______.

• A. predator
• B. competitor
• C. prey
• D. native species

Answer 1

The correct option is A

predator

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. Native species are organisms that are native to a given habitat.