XX.2.2 The realistic concept of species assumes that species and the boundaries between them are objectively present in nature, independently of man’s will

In contrast to the more or less single nominalist concept, there are a number of realistic concepts of species.They are all based on the concept that species and the boundaries between them are objectively present in nature, independently of man’s will.The individual realistic concepts differ primarily in what they consider to be the cause of the distinctness of the individual species.

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The classical Darwinian theory of evolution can explain the evolution of adaptive traits only in asexual organisms. The frozen plasticity theory is much more general: It can also explain the origin and evolution of adaptive traits in both asexual and sexual organisms Read more
Draft translation from: Evoluční biologie, 2. vydání (Evolutionary biology, 2nd edition), J. Flegr, Academia Prague 2009. The translation was not done by biologist, therefore any suggestion concerning proper scientific terminology and language usage are highly welcomed. You can send your comments to flegratcesnet [dot] cz. Thank you.