No, I have explained many times what so called sciences use as a premise. They look at how it now works. How fast evolution happens at the moment, how genes work now, and etc.
example
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Variation is caused by the mutation of genes or by an error in the replication of genes from one generation to the next.
[error? who says that when rapid evolution existed in the different past, errors were the reason for changes? If evolving was a created trait, it was no error! The freaky little mutated way things slowly change now, is not the measure at all for how it was...UNLESS you first prove the past had the same laws] In any given environmental condition some traits will be better suited to survive in that environment than others.
As far as I can see there's no reason to assume magic was at some point involved.
Basic Genetics
Every organism has two alleles for every trait. Alleles can be recessive or dominant. As the name implies when a dominant allele is paired with a recessive allele the dominant allele is expressed. Recessive alleles are only expressed when paired with the same recessive allele.
That is a very simplified explanation; alleles can also be co-dominant and share expression. A species can have more than two alleles for a trait, but each individual can only have two.[
but how did it work at the time most evolution occured, is the question they miss]
Selective Pressures
A selective pressure is an environmental factor that acts upon an organism. This can be caused directly by the environment or as an interaction between organisms. An example of a selective pressure that is caused directly by the environment is an organisms ability to survive in extreme heat. An example that is an interaction between organisms is a prey animals ability to hide from a predator.
Genetic Drift
Genetic drift occurs by the random mating and changes in gene recombination. [
It 'works' that way, yes, but how did it work?] Over time when one allele is even slightly more common than the other alleles for that trait it will gradually become even more common until it is fixed within a population. [
over time...no. only in the present, they assume it was the same, and even such basic stuff as what makes alleles work, and how they now work] When a trait is fixed in a population, there is no longer any genetic variation for that trait in that population [
in the present, that is how it works] for example a population with only brown eyes can be said to be fixed for that trait.
Evolution through Natural Selection
Evolution occurs when selective pressures act upon variable traits. [
pressures assumed to be in this state, and the same as today, more or less] This normally happens very, very gradually, but can happen quickly when the environment changes dramatically within a short period of time.
If a selective pressure affects the survival of some members of a population then those not negatively affected will have greater success at breeding and replicating their genes. This causes the percentage of alleles to shift in favor of the alleles of the more successful individuals. Over time this may cause a permanent change and the allele that is favored may become fixed.
One modern day example of evolution through natural selection is that of the Peppered Moth. There are two basic alleles in this species which attribute to the color of the moth; pale with speckles and black. The pale moth was by far the more common of the two forms (morphs) and it was once perfectly camouflaged against the moss and lichen on tree bark. After industrialization the trees near large cities and industrial plants became dark with soot and the moss died. In these areas the dark colored moth is now much more common. It is believed that because the light colored moths were no longer camouflaged they were more easily seen and eaten by predators such as birds. This meant that the black moths were better camouflaged and were more successful at reproducing. In less polluted areas the pale moth is still more common, further supporting the theory that the change was caused by adaptation."
Evolution: Basic Principles of Evolutionary Theory
etc etc
