http://slideplayer.com/11924651/67/images/233/139%29SB5d.+An+earthquake+causes+a+huge+canyon+to+form%2C+permanently+dividing+a+population+of+wild+donkeys.+On+the+windward+side+of+the+canyon%2C+dry+conditions+develop+and+grasses+grow.+On+the+leeward+side+of+the+canyon%2C+rainfall+is+frequent+and+a+forest+grows.+Which+of+the+following+is+LEAST+likely+to+happen+over+the+course+of+100%2C000+years.jpg