Struggle for life most severe between individuals and varieties of the same species; often severe between species of the same genus. The relation of organism to organism the most important of all relations.
Kermadi Mouadcompartió una citahace 9 meses
little doubt about many slight changes, such as size from the amount of food,
nullcompartió una citahace 2 años
the first author who in modern times has treated it in a scientific spirit was Buffon