Question

The relationship between species X and species Y is described as commensalism. This indicates that 

(a) both species derive mutual benefits like insect pollinators 

(b) both species suffer as between Plasmodium and its vector 

(c) X derives benefit while Y is harmed like lice living on human body 

(d) X derives benefit whereas Y remains unaffected as between Remoras and sharks

Answer 1

Correct option: (d) X derives benefit whereas Y remains unaffected as between Remoras and sharks

In commensalism, none of the associating species are harmed. One species can derive benefits from other species, which in turn remains unaffected.

e.g., Remoras obtain locomotion and food from sharks.