Dupiööc kɔ̈k ke biology aye nuɔɔr kaarou abac gam keepɛ̈I, man ye; luui apath cɔl viability (or survival) selection, ku jɔl ya dhiëth cɔl fecundity (ka fertility ka reproductive) selection, man ye luui agokë ciindeen de dhiëth ya juakic apɛi, cïmen cenë yen tïŋ në pïïrden yic.