Mutualism is the ecological in
which both participants and that
is obligatory their survival.
Mutualism is harmonious (positive)
ecological interaction. is also
known assymbiosis. of
mutualism are: the between
microorganisms that digest
and the ruminants or within
which they live; lichens, formed by
algae cyanobacteria that make
organic for the fungi and
water with their help;
bacteria of the genus that
associated to leguminous offer
nitrogen to these .