Actually, "hawk on", with the stress on the first syllable, would be a much closer approximation to the correct pronunciation than "how come". There's no diphtong, as in "how", and there's an "n", not an "m" at the end.
Speciation is indeed a hazy concept. Important polymorphisms in the human genome predate the split between humans and chimps (for instance the MHC class II genes). This implies that at these particular loci, a contemporary human may be more closely related to the chimp in the zoo than to the fellow next door.
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It's imprecise, nonetheless. My suggestion is much closer, unless he speaks with a very funny accent.
Actually, "hawk on", with the stress on the first syllable, would be a much closer approximation to the correct pronunciation than "how come". There's no diphtong, as in "how", and there's an "n", not an "m" at the end.
Speciation is indeed a hazy concept. Important polymorphisms in the human genome predate the split between humans and chimps (for instance the MHC class II genes). This implies that at these particular loci, a contemporary human may be more closely related to the chimp in the zoo than to the fellow next door.