There is no way to know what Peter Berean was taught, or why he appears to believe in people who taught him to believe in their pseudoscientific nonsense about evolution.
There are only example of ecological variation that have been linked to ecological adaptations in species from microbes to humans via conserved molecular mechanisms.
Each year scientists announce new species, after an often lengthy identification process, highlighting how much more there is to learn about the region.
With each new variant it becomes clearer that all biodiversity is energy-dependent and biophysically constrained by the physiology of reproduction in the context of the innate immune system and supercoiled DNA, which protects all organized genomes from virus-driven energy theft.
The rainbow snake, for example, can be compared to the fruit dove as an example of nutrient energy-dependent pheromone-controlled biodiversity. The fossil record cannot be compared to anything known about energy-dependent biophysically constrained biodiversity. With the exception of what might be natural fluorescence in dinosaur osteocytes, all the energy-dependent variation seems to be missing from the fossil record. The nutrient-dependent pheromone-controlled weekend resurrection of the bacterial flagellum in P. fluorescens attests to that fact.
So does this report on nematodes. Worms Developed as Research Model for Microbiome & Disease
They linked the nutrient-dependent pheromone-controlled physiology of reproduction in bacteria to biodiversity in two nematode species and claim that one of them evolved into a predatory nematode with teeth during the past 200 million years.
“The patterns of synaptic connections perfectly mirror the fundamental differences in the feeding behaviours of P. pacificus and C. elegans”, Ralf Sommer concludes. A clear-cut result like that was not what he had necessarily expected. Previous studies in much simpler neural circuits – as in the marine snail Aplysia – had indicated that changes in behaviour do not have to coincide with changes in number and location of synapses. Differences in physiological properties of neurons or in their modulation by neurotransmitters can be sufficient to effect behavioural changes.
For comparison, see the article by Taylor et al on the weekend resurrection of the bacterial flagellum in P. fluorescens. Evolutionary resurrection of flagellar motility via rewiring of the nitrogen regulation system
If you have ever worked in a medical laboratory and still believe in the pseudoscientific nonsense about millions of years of evolution, I hope you are not helping people like Peter Berean to kill people with your ridiculous beliefs about energy-dependent biologically based cause and effect.