And indeed there is, since many cannot interbreed, which is one of the defining aspects of a species. From Wordnik.com. [Lauri Lebo blog and the End of the World - The Panda's Thumb] Reference
Man could interbreed with man -- aliens could not. From Wordnik.com. [The Lani People] Reference
It was not good for families to interbreed endlessly. From Wordnik.com. [Hawaii]
The two species do not, however, interbreed in the wild. From Wordnik.com. [6 Wild Banteng] Reference
How long did they interbreed before the gap became too wide?. From Wordnik.com. [The Evolution of Man Scientifically Disproved In 50 Arguments] Reference
And what ever you do, don't interbreed with the Moabites. From Wordnik.com. [The Stain of Sin] Reference
Dogs do not become cats, nor interbreed to produce another species. From Wordnik.com. [The Evolution of Man Scientifically Disproved In 50 Arguments] Reference
And you keep the Families intact: No strays; you do not interbreed. From Wordnik.com. [OpEdNews - Diary: IT'S A FUNNY WORLD] Reference
The two will interbreed, but the hybrid offspring are normally sterile. From Wordnik.com. [1 Microcattle] Reference
It isn't their fault if they can't interbreed with us and don't grow old. From Wordnik.com. [Operation Luna]
So they sent them to the Philippines to interbreed with the lovely ladies. From Wordnik.com. [for your viewing pleasure this thanksgiving . . . « Magic Lantern Arts] Reference
Suppose that ancestral horses and humans interbreed and in time produce centaurs. From Wordnik.com. [Stork Naked]
Banteng and cattle have the same number of chromosomes, and they will interbreed. From Wordnik.com. [1 Domesticated Banteng] Reference
It also assumes that organisms that cannot interbreed do not form stable lineages. From Wordnik.com. [Species] Reference
Over time its citizens interbreed ensuring a severed connection to the motherland. From Wordnik.com. [Blogging on empty « BuzzMachine] Reference
Dogs and wolves can and do interbreed, and scientists consider them the same species. From Wordnik.com. [Todd Palmer and Rob Pringle: Why We Need Wolves In Our Parks] Reference
Of course, they can interbreed, but the children tend to follow the mother's coloring. From Wordnik.com. [Changeling]
Despite large differences in size, color, and appearance, all domestic breeds interbreed freely. From Wordnik.com. [5 Chicken] Reference
Wild and hatchery trout may interbreed, which threatens the genetic individuality of the wild stock. From Wordnik.com. [Trouble In The Trout Family] Reference
Thus came to be the Water Wing, a passive region where men and creatures could reside and interbreed. From Wordnik.com. [Demons Don't Dream]
Sort of tangential to this point -- how is it that donkeys and horses can interbreed to produce mules?. From Wordnik.com. ["So what did Neanderthal women do all day?"] Reference
Also, they interbreed freely with the gaur, banteng, yak, and cattle of both the taurus and zebu types. From Wordnik.com. [1 Domesticated Banteng] Reference
Essentially it was based upon species compatibility -- on the concept that like can interbreed with like. From Wordnik.com. [The Lani People] Reference
Biology classifies all living things into species, or groups of organisms that interbreed regularly and successfully. From Wordnik.com. [Chimps may belong in the human genus] Reference
Although these animals rarely interbreed in the wild, they can interbreed in captivity and produce fertile offspring. From Wordnik.com. [ACSI v. Stearns, aka Wendell Bird vs. UC - The Panda's Thumb] Reference
Ecologically separated populations may become quite divergent and still be able to interbreed in the right conditions. From Wordnik.com. [Microbiology pioneer dies - The Panda's Thumb] Reference
The golden eagle is aquila chrysaetos; the bald eagle is haliaeetus leucocephalus and never the twain shall interbreed. From Wordnik.com. [The Right Eagle] Reference
The scientists said there was no clear scientific definition of a species -- inability to interbreed was often favoured. From Wordnik.com. [Archive 2007-02-01] Reference
The two population don't interbreed, and genetically, the apple maggot fly as a species came directly from the hawthorn fly. From Wordnik.com. [Balkinization] Reference
Some of these humanoid hogs would eventually have made it back to Earth where they would continue to interbreed with humans. From Wordnik.com. [DAY OF SWINE AND PROSE] Reference
The unity of mankind is also conclusively shown by the fact that all races interbreed, the most certain test of every species. From Wordnik.com. [The Evolution of Man Scientifically Disproved In 50 Arguments] Reference
In a few thousand years, there may be no remaining significant racial differences at all as we continue to interbreed and blend. From Wordnik.com. [Archive 2008-10-01] Reference
The members of a biological species interbreed, share common developmental programs, and are exposed to common selection regimes. From Wordnik.com. [Species] Reference
If we did interbreed, we should be able to point to certain genes, and say, there, that one, that's a gene that was introgressed. From Wordnik.com. [Quantifying Neanderthal introgression by serial coalescent simulations] Reference
One species can be distinguished from its closest kin only retrospectively, when it is found that the two can no longer interbreed. From Wordnik.com. [Saving Us from Darwin] Reference
But they did interbreed-and now the human folk are strong, and goblins and harpies are weak, when once it was the other way around. From Wordnik.com. [Dragon on a Pedestal]
"Yeah, but ..." you add "... these genetically engineered salmon could interbreed with wild salmon, and then we're messing with nature.". From Wordnik.com. [David Ropeik: Transgenic Food -- the Science and the Psychology] Reference
Until relatively recently, domestic dogs must have been free-ranging and hence would have had ample opportunity to interbreed with wolves. From Wordnik.com. [Archive 2006-10-01] Reference
It is entirely possible that Cro-Magnons and Neanderthals eventually began to interbreed, but the offspring produced were sterile 'mules.'. From Wordnik.com. [Why We Finally Stop Hunting] Reference
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