interfertility

In particular he argued that humans were one species, using the interfertility criterion of hybridity.

Their interfertility is yet to be proven scientifically.

This classification was based on several factors including interfertility, chromosome uniformity, chemotype, and numerical analysis of phenotypic characters.

Charles Darwin regarded the evidence of interfertility as conclusive, and substantiating the biological unity of humankind.

The criterion of interfertility for a single human species was not universally accepted, being rejected, for example, by Samuel George Morton.

Prior remembered that there was a story about interfertility of man and sheep, a crossbreed between the two.... but he doubted the validity of that.

As the interfertility of oranges and other citrus has produced numerous hybrids, bud unions and cultivars, their taxonomy is fairly controversial, confusing or inconsistent.

The interfertility of human races was debated, applying to human speciation arguments advanced already by Georges-Louis Leclerc, Comte de Buffon.

Interfertility of horses and donkeys is common, although sterility of the offspring (mules) is nearly universal (around 60 exceptions have been recorded in the whole of equine history).

White defended the theory of polygeny by refuting French naturalist Georges-Louis Leclerc, Comte de Buffon's interfertility argument, which said that only the same species can interbreed.

Thus he discarded such impossible but commonplace notions such as interfertility of human beings with humanoid alien races, civilizations possessing flying machines but no ground transport, bladed weapons and advanced gunnery coexisting in the same society, and faster than light travel.

However, this classification may also be revised since three of the four Macrocystis species are interfertile (M. laevis ' interfertility has not yet been tested), holdfast as well as blade morphology is plastic, and all four species are genetically similar.

Thomas Richard Heywood Thomson delivered a paper in 1854 to the Society on interfertility, casting doubt on comments of Paweł Edmund Strzelecki about female infertility among Aboriginal Australians after they had given birth to a child with a Caucasian father.

Richard Kerrigan undertook genetic and interfertility testing on several fungal strains, and showed that samples of the Brazilian strains called A. blazei and A. brasiliensis were genetically similar to, and interfertile with, North American populations of Agaricus subrufescens.