No one takes issue with change over time, adaptation to environment; but those changes were never sustained over the long term. The changes would revert back once food was readily available.
Those changes never, ever resulted in one animal changing into another animal.
That is SCIENTISM... not science. It is a pimple-popping-junior-high-school biology. It is philosophy pretending to be science.
Fish eggs are still fish eggs and chicken eggs are still chicken eggs. Horse spermatazoa is still horse spermatazoa... etc.
Pfft. I feel like I'm debating against God Himself... because He has 'given them over to a strong delusion'.... one of their own making. If He gave them over to it... how can we get them out of it?
Even if someone was to rise from the dead they would not believe.
They never stop to ask themselves the serious questions about their delusions, like:
How could a mindless process make a mind?
How could nature ‘think ahead’ to create perfectly opposite and complimentary sex organs in plants and animals?
If your brain is just the result of billions of cosmic ‘accidents’ how could you trust it for rational thought?
If the combined intelligence and technology of the human race can’t produce just one living cell (let alone a self-replicating blade of grass) from scratch, how could a non-intelligent process produce the intricacies and diversity of the interdependant infrastructure we see?
And how could matter itself ingeniously self-replicate? And what caused the natural and moral constants? And what is the basis for moral beliefs if there is no ultimate truth? All you would have left are opinions; one would be just as valid as the next.
The Life Force that created the galaxies, the heavens, the earth, the seas and all things in them; made you and wants an intimate relationship with you. He gave you His Son as a way to do just that.