question_answer 36)

  Lichens are the associations of (a) bacteria and fungus                                                 (b) algae and bacterium (c) fungus and algae                                                       (d) fungus and virus

Answer:

                  (c) Lichens represent a positive (beneficial) interaction between two different species, one fungus and another algae. Rest of the species combination or associations are not true for lichens. Note Algal species is called as phycobiont while fungal species 'is referred to as mycobiont .The fungal species comes from two classes Ascomycetes (ascolichen) and Basidiomycetes (basidiotichen).