otter-sheep

Updated: June 13, 2025

While co-operative parts would often be more or less correlated, so that they would tend to vary together, coincident variation is not necessary. Seeing that artificial selection of complicated variations has modified animals in many points either simultaneously or by slow steps, as with otter-sheep, fancy pigeons, &c. Wallace concludes that Mr.

W. P. (William Platt) Ball - Are the Effects of Use and Disuse Inherited?: An Examination of the View Held by Spencer and Darwin