question_answer 35)

  Amensalism is an association between two species where (a) one species is harmed and other is benefitted (b) one species is harmed and other is unaffected (c) one species is benefitted and other is unaffected (d) both the species are harmed.

Answer:

                  (b) When one species is benefitted and other is harmed, in an association between two species, it is called amensalism. In commensalism one species is benefitted and other is unaffected. The other options are in correct because while in when one species is harmed another is benefitted, the relationship is termed as parasitism.