The only way to be one hundred percent sure would be to try and breed a human and one of the other species. If their offspring are viable, then the species is just a different type of human, but if the offspring aren't viable, then there are two distinct species.
2007-01-26 15:30:32
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answer #1
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answered by Anonymous
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The idea of a "Species " is really an awkward sort of construct. Since all animals and plants are descended from common ancestors and carry common DNA, the idea of a species is mainly a convenience for people who want to be able to study or classify organisms easily.
Generally, two organisms are considered to be in different species if they are unable to produce a fertile offspring. So, a horse and a donkey can reproduce but their offspring (the mule) is not fertile. Therefore, horse and donkey are different species.
2007-01-26 23:33:11
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answer #2
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answered by matt 7
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According to the biological species concept, which is the most common definition of what a species is. A species must have the ability to breed with members of its own species to produce fertile and functional offspring. Breeding with members of other species results in either no offspring, infertile offspring or abnormal offspring.
2007-01-26 23:38:46
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answer #3
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answered by dan81_dr 1
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A species is defined as a group of organisms that can reproduce with each other AND ONLY WITH EACH OTHER and create viable offspring, meaning the next generation can also reproduce with each other.
2007-01-26 23:51:09
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answer #4
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answered by Vincent A 4
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You need to do a DNA analysis, see if the DNAs of the two humans are different or, sufficiently different to be classified as seperate species, and of course check the intercourse markers.
2007-01-27 02:18:25
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answer #5
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answered by Qyn 5
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Failure to breed with the other species. Think mules.
2007-01-26 23:29:04
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answer #6
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answered by Anonymous
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I was going to answer this, but Matt answered it so well I decided not to bother. Go with his answer...
2007-01-27 08:16:36
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answer #7
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answered by RjKardo 3
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Not sure.
2007-01-26 23:30:20
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answer #8
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answered by da_hammerhead 6
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