Categories Quote by W. J. T. Mitchell

The morphological characteristics of plant and animal species form the chief subject of the descriptive natural sciences and are the criteria for their classification.…

— Karl Landsteiner

“Just as a concept becomes a unit when integrated with others into a wider concept, so a genus becomes a single unit, a species,…

— Ayn Rand

The fundamental problem in the origin of species is not the origin of differences in appearance, since these arise at the level of the…

— David Lack

The thing that defines a species is that all members have the same addressing system for their DNA.

— Richard Dawkins

It is not always the magnitude of the differences observed between species that must determine specific distinctions, but the constant preservation of those differences…

— Jean-Baptiste Lamarck

A species consists of a group of populations which replace each other geographically or ecologically and of which the neighboring ones integrate or hybridise…

— Ernst Mayr

Nature is a word, an allegory, a mold, an embossing, if you will.

— Charles Baudelaire

It is really laughable to see what different ideas are prominent in various naturalists' minds, when they speak of 'species'; in some, resemblance is…

— Charles Darwin

The human species is made up of seven billion subspecies each consisting of one specimen.

— Robert Breault

“As long as museums and universities send out expeditions to bring to light new forms of living and extinct animals and new data illustrating…

— William King Gregory

“As the species of the same genus usually have, though by no means invariably, much similarity in habits and constitution, and always in structure,…

— Charles Darwin

Biology is the study of complicated things that give the appearance of having been designed for a purpose

— Richard Dawkins