As Darwinian scholar Joseph Carroll of the University of Missouri–St. Louis puts it in his introduction to a modern reprint of Darwin's work: „The Origin of Species has special claims on our attention. It is one of the two or three most significant works of all time—one of those works that fundamentally and permanently alter our vision of the world....It is argued with a singularly rigorous consistency but it is also eloquent, imaginatively evocative, and rhetorically compelling.“ On the origin of species by means of natural selection. Peterborough, Ontario, Broadview, 2003. ISBN 1551113376. с. 15.
Smith, A. L. Oxford dictionary of biochemistry and molecular biology. Oxford [Oxfordshire], Oxford University Press, 1997. ISBN 0-19-854768-4. с. 508. Photosynthesis – the synthesis by organisms of organic chemical compounds, esp. carbohydrates, from carbon dioxide using energy obtained from light rather than the oxidation of chemical compounds.