Fruits were abundant in Cretaceous. 
Jesus used to say: the Father requires of you only that you shall bear much fruit. 
True, many apparently religious traits can grow out of nonreligious roots. Man may graft many purely humanistic branches onto his basic spiritual nature, a godless religion. In such a mortal experience only social fruits are forthcoming, not spiritual. The graft determines the nature of the fruit, notwithstanding that the living sustenance is drawn from the roots of original divine endowment of both mind and spirit.  We must bring forth fruit worthy. Every tree that brings not forth good fruit is destined to be cut down and cast into the fire.  By their fruits we shall know people. Every good tree brings forth good fruit, but the corrupt tree bears evil fruit.