@Musky Hunter,
Musky Hunter;62518 wrote:"In scientific experiments, there are experimental and control groups. In the control group all variables are held constant. The control group is subjected to the same actions or procedures as the experimental group except that the independent variable being tested is omitted. ..."
define:CONTROL GROUP - Google Search
That is a "control group" used for experimentation. I should have used the proper term which is "constant". My mistake. However it still stands that for testing for a deity, this piece does not exist.
Quote:Where is the human control group? Where is the repeatable and testable experiment regarding the evolution of humans. Where are the humans that did, are, and continue to evolve vs. the control group of humans that are not?
Chromosome 2 is a very valid and testable (not to mention admissible in a court of law) experiment and prediction showing the evolution of humans. In fact, this was a bit of a stumbling block in showing common descent of humans and modern great apes. Evolutionary biology made a prediction, this prediction was verified.
Humans continue to evolve and always will. There are always random mutations present for the variable and the environment is your constant.
Here's a good example:
Take the mutation known as CCR5delta32. This is a mutation regarding T-cells and some of their receptors being deactivated (delta refers to a deletion of genetic code, in this case the code that handles these receptors). What does this mutation do? It provides a natural immunity to AIDS... the virus cannot attack the T-cells because its normal avenue, being the aforementioned receptors, is now blocked. Now, what do you suppose will happen to humans bearing this mutation in an environment where the AIDS virus is rampant? You guessed it! They survive and pass on that mutation. Those that do not possess this mutation are more likely to die... their genetic line stops.
An excellent example of environmental pressure selecting a random mutation.
But let's play the game differently... let's change our constant...
Instead of AIDS being prominent in our test environment, let's make West Nile the environmental constant. CCR5delta32 makes its bearer more susceptible to WNV. Environmental pressure then selects
against this mutation. Those that have it are at a higher risk of death, thereby not passing on the mutation... their lines end.
Final question, class. What will happen to a group where neither of these environmental pressures are present? That's rather easy... natural selection will not play upon this mutation, and it will be distributed randomly through the populace, its presence is not positive or negative.
In an experiment to predict this facet of evolutionary biology, what would our third group of humans be called? That's right... a
control group.
Class dismissed