The idea that human evolution is a perfecting process is ludicrous.
First off, man cannot evolve outside of the information or instructions
he receives from his environment. And since environmental instructions
are not perfect, evolution cannot be a perfecting process.
Secondly, every forward evolutionary step is coupled with a backward
devolutionary step. In other words, evolution and devolution are mutually
exclusive. I shall illustrate my logic using the genetic disorder of sickle-cell
anemia.
The genetic signature of many people in the tropics had changed or
mutated over time to develop a natural-defense-mechanism to malaria.
This mutated gene forces the regular disc-like shape of the red blood
cell to be sickle, an evolutionary feature that allows tropical people to
withstand deadly malaria-fever. I must mention that human genetic
signature is a binary signature. That is, when one side of the signature
changes to accommodate a new set of environmental instructions, the
other side devolves to compensate for this change. So, while sickle-cell
signature is a natural shield against deadly malaria fever, its complementary
or "trade-off" pair is actually destructive to the flow of oxygenated blood
in the human body. Similar trade-offs can be seen in people who suffer
from Alzheimer, Autism, hypovitaminosis D etc. For example, Alzheimer and
Autism are reverse compensations for the complexity of the human brain
power, and hypovitaminosis D is a reverse compensation for hyper-melanization.
Let me now tie my reasoning above to the issue of genetically modified
foods (GMO). Many people are worried sick that the current surge in
the consumption of GMO foods would be harmful to human health. Yes,
the consumption of GMO foods would be destructive to the human body in
the short run; because, the GMO foods would introduce new or un-recognized
set of instructions into the human cells. But in the long run, as the human body
gets used to these GMO induced instructions, at least one human genetic
signature would change or mutate to neutralize the adverse effect of GMO diets
on the body. So, this dramatic change in human genetic signature is what many
people call evolution. Again, since evolution and devolution are mutually
exclusive. The moment at least one genetic signature evolves or changes to
neutralize the adverse effect of the GMO diets, another genetic signature
devolves or mutates to replace the evolved genetic signature.
In conclusion, evolution is a gradual change in the genetic structure of
the biological populations due to a change in the environmental instruction
or information. And since environmental instructions are not perfect; then,
evolution cannot be a perfecting process.
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ReplyDelete.... iv been wandering why homo sapiens have not been able to mutate and develop better eye sight.Scientists are not sure why some animals ding dogs, cats, hedgehogs and ferrets can see in UV, giving them a better view at night among other benefits can see ultraviolet light and others can't.
ReplyDeleteIt is thought that some use it to see in the dark as well as spotting potential mates or predators. Reindeer for example see UV light and it helps them spot polar bears that appear to be incredibly well camouflaged in white snow.
Bees and other insects use their UV vision to see colours and patterns on plants.
Rodents use it to follow trails of urine, but they are not sure what pets use it for.
Experts also question why human eyes filter out UV light.
Some think it could be to protect the delicate retina, but other animals that live for a long time and see UV do not have damaged eyes.
Other scientists consider that the human eye is best suited to seeing detailed images in low levels of light, whereas other creatures that see UV tend to see in less detail.
There are layers of mysteries. Particularly the sequencing of nucleotide for protein manufacture. It appears ther's an Intelligence behind the codes ... whose purpose we do not know....
Before pets were domesticated, they were just another animal in the wild. So, it's plausible that domestic animals evolved in the wild to see UV light; a feature they now have very little use for as pets, and might be lost eventually. Similarly, we, humans, probably lost our ability to see UV light due to the changes in our environment.
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