Question : Name the interaction in: (a) Lichen (b) Sucker fish and shark (c) A protozoan living in the digestive tract of a flea living on dog.

Question : Name the interaction in: (a) Lichen (b) Sucker fish and sh

1.	Question : Name the interaction in: (a) Lichen (b) Sucker fish and shark (c) A protozoan living in the digestive tract of a flea living on dog.
Answer» SOLUTION :(a) Lichen shows mutualism between alga and fungus. THUS this interaction is mutualism. (b) In SUCKER FISH and shark, sucker fish is benefitted for free rides, shark neither gets benfitted nor harmed. Thus this interaction is commensalism. (c) A protozoan living inside the body of flea is a hyperparasite. Flea is also blood SUCKING ectoparasite on the dog. Therefore, a protozoan becomes hyperparasite in its interaction.