Resultado de búsqueda
original and permanent distinctness of species is, that varieties produced in a state of domesticity are more or less unstable, and often have a tendency, if left to themselves, to return to the normal form of the parent species; and this instability is considered to be a
In the absence or scarcity of facts and observations as to varieties occurring among wild animals, this argument has had great weight with naturalists, and has led to a very general and somewhat prejudiced belief in the stability of species.
Wallace wrote his paper On The Tendency of Varieties to Depart Indefinitely from the Original Type at Ternate in February 1858 and sent it to Darwin with a request to send it on to Lyell.
On the Tendency of Varieties to Depart Indefinitely from the Original Type. Alfred Russel Wallace. One of the strongest arguments which have been adduced to prove the original and permanent distinctness of species is, that varieties produced in a state of domesticity are more or less unstable, and often have a tendency, if left to themselves ...
While in Ternate, he wrote and sent to Darwin his manuscript "On the tendency of varieties to depart infinitely from the original type", a brilliantly clear and concise description of the origin and subsequent divergence of species.
The attached pdf file contains a near-exact facsimile transcription of this famous work by Alfred Russel Wallace, just as it appeared in its original place of publication, the Journal of the Proceedings of the Linnean Society: Zoology (Volume 3, No. 9, 20 August 1858, pages 53-62), where it was directly preceded by Charles Darwin's first ...
'On the Tendency of Varieties to Depart Indefinitely From the Original Type' is a short article on variation and evolutionary theory. Alfred Russel Wallace was born on 8th January 1823...
