Interdependence
“In fact, we are always meeting in nature with admirable examples of the close correspondence between the forms of the organs and the offices they fulfill, even when these bring no actual benefit to the animal. The insects which suck nectar from flowers of a certain kind, develop probosces adapted to the length of corolla which those flowers possess. But they also develop a coating, quite useless to themselves, by which they collect pollen, and this fertilizes the flowers they will visit afterwards. … (more…)