Immediately adjacent or neighboring populations of the species vary slightly but can interbreed. But at the extremes of the distribution -- the opposite ends of the pattern that link to form a ...

In high school biology we are told that species are communities of individuals that can interbreed successfully. Two creatures that cannot interbreed, even if they resemble each other, must belong ...

A species is a group of organisms that interbreed to produce fertile offspring ... Sometimes individuals from two different species can reproduce. For example, animals called ligers are produced ...

On this basis, ‘species’ that interbreed with each other cannot actually be distinct ... pelvises and ear bones, they can be regarded as different species, interbreeding or not. Humans are great ...

Hidden in many people’s genetic codes is a mystery that has long intrigued scientists — a tiny slice of Neanderthal DNA that persists tens of thousands of years after the species vanished.

So much so, in fact, the two species can interbreed. They live in the Arctic and rely on the marine ecosystem to survive. Most of the year, they reside on sea ice, but migrate to land once that ...

Chimps and bonobos have interbred, so under Mayr’s schema they are not separate species. Similarly, polar bears can interbreed with brown bears, and red wolves in the US seem to be hybrids ...

As long as the individuals in a population have the opportunity to interbreed and combine genes, they remain one species. A population of one species can only evolve into more than one species if ...

Can gene pools vary within populations? From the perspective of a geneticist, a population is a group of organisms of the same species that interbreed. This may mean that the group of organisms ...

Scientists do not know if the two sardine species can interbreed. This is a key question that would help determine how these ...