geographic isolation
Yes, most bird species' feathers are distinctly different from other birds' feathers.
biological evolution ...........studyisland
Taxonomically, they belong to the weasel family, and the 'true weasel' genus. However ermine (Mustela erminea) are a distinctly different species to the animal commonly referred to as a weasel (Mustela nirvalis).
Number of different species
there are exactly 158 different species there are exactly 158 different species
different species of plants having very different DNA causes them to be different species of plants.
different species of plants having very different DNA causes them to be different species of plants.
different species of plants having very different DNA causes them to be different species of plants.
different environments produced different species by natural selection.
different environments produced different species by natural selection.
There are many different species of diatoms, and the different species are different in shape and size.
There is not 13 different species of finches, there are one species. There are variations, but still one species. There are 250 different breeds of dogs, but still dog species