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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
- "On the Tendency of Varieties to Depart Indefinitely From the ...
This paper, along with excerpts from two unpublished...
- "On the Tendency of Varieties to Depart Indefinitely From the ...
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. Darwin received it on 18 June 1858, [3] and wrote to Lyell that "your words have come true with a vengeance,... forestalled" and "If Wallace had my ...
- A. Radcliffe-Smith, Charles Darwin
- 1858
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.
- Alfred Russel Wallace
- 2016
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 ...
Estando en Ternate, escribió "On the tendency of varieties to depart indefinitely from the original type", una descripción brillante, clara y concisa sobre el origen y posterior divergencia de las especies, que envió a Darwin para obtener su opinión.
Hace 4 días · On the Tendency of Varieties to Depart Indefinitely from the Original Type. The Struggle for Existence. The life of wild animals is a struggle for existence. The full exertion of all their ...
'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 in the village of Llanbadoc, in Monmouthshire, Wales.
