Question

Which one of the following pair does NOT show commensalism?

Options

• Sea - anemones - crab

• Barnacles - whale

• Shark - Remora fish

• Cow - bacteria

Answer 1

Cow - bacteria

Explanation:

Cows and cellulose-digesting bacteria have a symbiotic relationship in which both parties gain. The cow offers bacteria with a desirable, moist environment with a steady supply of food, while the bacteria allow the cow to access the nutrients in its cellulose-rich diet while also providing a protein source.