When two or more species live intimately together with their fates linked, occurs.

Mutualisms are not static, and can be lost by evolution.[41] Sachs and Simms (2006) suggest that this can occur via four main pathways:One mutualist shifts to parasitism, and no longer benefits its partner,[41] such as headlice[42]One partner abandons the mutualism and lives autonomously[41]One partner may go extinct[41]A partner may be switched to another species[43]

This is a type of species relationship involving organisms that live in or on another organism and feed on it without immediately killing itSelect one:a.Mutualismb.Commensalismc.Inter Specific Competitiond.Predation

‘Two closely related species competing for same resources cannot co-exist indefinately’. This law is also called

When the result of an interaction between two species is positive for both it is called .

A close and often lifelong ecological relationship between species is calledMultiple choice question.succession.species richness.a keystone.a symbiosis.