In biological terms variety ensures survival of the species since in any large population there will always be individuals who are unusually well adapted to a particular environment, or resistant to a particular infective agent.
(variety; ensures; survival of the species; since in any large population there will always be individuals; L:In biological terms) (individuals; are; unusually well adapted to a particular environment, or resistant to a particular infective agent)
variety individuals
ensures are
survival of the species since in any large population there will always be individuals L:In biological terms
unusually well adapted to a particular environment, or resistant to a particular infective agent