Lichens, which are capable of initiating ecological succession even on a bare rock, are actually a symbiotic association of _

Q. Lichens, which are capable of initiating ecological succession even on a bare rock, are actually a symbiotic association of __:
Answer: algae and fungi
Notes: A lichen is a composite organism consisting of a fungus (the mycobiont) and a photosynthetic partner (the photobiont or phycobiont) (usually algae) growing together in a symbiotic relationship.