For people that don't believe in evolution, if humankind can, in just twenty thousand years (or whatever), selectively breed into....?
....existence all of today's many various domestic canine breeds from a single ancient wild canine species, why does it seem impossible to you that billions of years of natural selective processes couldn't produce species that differ radically compared to their common ancestors? I mean, I don't believe the Noah story, but do you think there were beagles, bulldogs, and poodles on the ark?
The important thing for you to learn from your asking this question is that creationists accept what they have decided to call "microevolution". So, they believe that the Ark had maybe a tiger, and, later that microevolved into cougars and leopards and cats.
They don't believe in what they call "macroevolution" where a dog evolved into a cat. But scientists don't think dogs evolved into cats, or the other way around. They both evolved from an ancestor that had some characteristics of dogs and cats combined, and, by getting isolated, natural selection bred the the doglike attributes out of the population that eventually became the first true felines and the catlike attributes got bred out of the group that became the canines.
Many theists can accept that that happened. But they aren't willing to accept that primitive apes evolved into humans. So, arguing about animal evolution doesn't get you where you want to go.
Creationists are dumb. They think that we have to choose between the Bible and science. If I had never heard of the Bible except for that idiotic claim, I would not be a Christian. Thank God that I looked deeper than that.
Genesis was written to sheepherders who lived 3000 years ago, not to 21st Century scientists.
People deny evolution because they haven't figured out that the Genesis passage was written to people who were herding sheep 3000 years ago. These sheep herders did not know about quantum relativity, string theory, Higg's boson or time frames of billions of years. The purpose of the Genesis account is about who (God) made the Universe, not about when or how He made it.
The Time line of Creation http://www.rareuniverse.org/timeline.html
Robert De Angelis-Italy-United States2019-02-22T18:56:06Z
It does not matter if you believe that there has been Noah, but God entrusted him with the task of saving the animals before the universal flood! Obvious that on the vessel c'were each type of animals!