Question

explain symbiotic relation ship in linchens?
this question is from class-7 science

Answer 1

Obligate symbiosis is when two organisms are in a symbiotic relationship because they can't survive without each other. Facultative symbiosis is when the species live together by choice. There are four main types of symbiotic relationships: mutualism, commensalism, parasitism and competition.Jan 29, 2015

MARK AS BRAIN LIST PLZZZ