What two types of organisms own a symbionic relationship to be exact lichens?
Answer:
the two spieces are
1.fungi
2.algae
according to the latest concept proposed by Crombie a lichen is not a symbiotic relationship a bit it is a master(fungi) slave (algae) relationship. this is so because only the fungi can reproduce and the algae individual provides food for the fungi to grow.but some scientist argue that the algal partner also finds shelter in the fungi.consequently the deem it as "symbiotic"
bacteria and funghi