Amy,
Now that you mention it, I could have used the wrong word, but Webster backs me up.Whew!
I said that I believe there is evolution within species (not to the point of becoming another species).
I just mean "change". And I'll use my husband's example-- the mighty Cockroach!
At some point the cockroach became a pest. So, man developed a chemical to kill it. All was well, until one day when they were back! They had somehow grown used to the chemical. Something 'changed'. But it was still a cockroach. And I think they've changed more than once to survive. YOU probably can tell me that 'young one'!
So, am I OK here, or do I need to change my word? I trust your judgement here, just keep it simple!
Becky

PS. I apologize to Chris, who told me where to go to find out how to cut and paste. I'll get there. But am anxious to post whenever I come up with an answer.