Question

Match the Column I with Column II.

Column I	Column II
A. Lichen	(i) Commensalism
B. Shark and Pilot fish	(ii) Mutualism
C. Barnacles on the back of a whale	(iii) Symbiotic obligatory relationship
D. Sharks and dolphins	(iv) Competition

विकल्प

• A-(ii), B-(i), C-(iii), D-(iv)

• A-(ii), B-(iii), C-(i), D-(iv)

• A-(iii), B-(ii), C-(i), D-(iv)

• A-(iv), B-(ii), C-(iii), D-(i)

Answer 1

A-(iii), B-(ii), C-(i), D-(iv)

Explanation:

• In an obligatory symbiosis, both organisms are directly dependent on one another, and one species, like lichens, would perish without the other.
• Pilot fish and sharks rely on one another. The shark is liberated from parasites while the pilot fish is shielded from predators. They have a mutualistic relationship as a result.
• Whales with barnacles on their backs are an example of commensalism in which the whales themselves do not profit from the barnacles' attachment. Dolphins and sharks are more competitive. The food that the two competitors eat may be the basis of this contest.