About Cain and Abel's wifes:
Chapter 4.1
To Kayin, to his brother, to Hevel.
The word {Hebrew Ref} is repeated thrice implying additional {facts or things}. This teaches that a girl twin was born with Kayin, and two were born with Hevel. Consequently, {concerning Hevel} it says: {Lit.} "And she increased" {in giving birth}.
And before anyone starts complaining about incest, I wanna remind you that NOW and THEN are two totally different conditions/situations, in quite many aspects.
So you can't apply nowadays morality and laws to those of the first humans.
About long life terms.
Do you have any evidence against it?
Or is it just another assumption that since WE can't live for so long, THEY couldn't too?
Noah Ark.
Just another definition of "kind".
Again, micro evolution does work.
So who said, they couldn't have had some 1% of today's species that rapidly evolved after the Flood into variety we have now?
The Ark was quite huge, so I don't think there was a problem to fit a few thousands of big animals into it.
And if you interpret "kind" as "family" (or possibly "genus"), you don't get too many animals.
Again, I must repeat that I disagree with species being the threshold between micro and macro.
We know quite a few inter-species hybrids, which leads to say that it's definitely NOT the "basic unit of evolution".
Just to bring some examples of how species doesn't mean so much:
Main article about hybrids.
Liger: Same genus
Guineafowl: Same family.
Even more bird examples: Up to the same family.
And you STILL hold on to "macro being observed"???
What I say, is the opposite: The so-cherished "species" isn't so definitive AT ALL.
Which means that MICRO can be EXPANDED much more up the taxonomy.
And the reason why typically interbreeding isn't common, is NOT biological, but rather "populational": animals of the same species are "easier" to mate with, both geographically and behavior-wise.