About: http://webisa.webdatacommons.org/159174977

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	I have been reworking my pigeons and other domestic animals, and I am sure that any one is right in saying that selection is the efficient cause, though, as you truly say, variation is the base of all.
http://www.w3.org/ns/prov#wasQuotedFrom	darwin-online.org.uk