In contrast to the evolutionary principle of common ancestry, creation biologists argue that all life on Earth is not related to one ultimate single-cell but that life was created in a finite number of discrete forms, which subsequently underwent speciation and massive genetic change over millions of generations.
That does not fit with the idea of two of each biblical "kind" being brought aboard the Ark, then undergoing speciation post flood. You are still left with the problem of getting two of every species on board with a year's supply of food for each animal.
The contention by creation biologists of speciation over millions of generations also seems inconsistent with a 6,000 year old Earth.
Are you thinking of millions of generations vertically, horizontally, or both?
BTW, that would be two of every biblical kind, not two of every species...the two should not be confused.