How Evolution Works Part 3- DNA
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@alsdyall No matter how life began, evolution is only concerned with what happened once that life began multiplying and survival of the fittest stepped in. The exact boundary between abiogenesis and evolution is very ill-defined. That we do not know. BUT, every year scientists are working to find out, and one day we will very probably have an answer. We might not be able to say "This is exactly what happened", but we'll be able to point out the most likely hypotheses.
kurayamisidekick 1 week ago
@alsdyall In his defense, understanding an elephant as a whole is probably not that terribly complicated. And yes, you can be an expert on an elephant's trunk without having a solid grasp of the elephant as a whole. A neurosurgeon certainly doesn't know how to operate anywhere else in the body.
As for evolution, the first organisms might have come about by abiogenesis, in rocks from outer space, aliens sneezing on our planet, or God saying 'Let it be. That doesn't matter.
kurayamisidekick 1 week ago
@coltharpnicholas These are forms of reductionism I don't wish to take part of. You can't take a part of something (life, organisms) in fragments and expect it to make any sense in the whole. You can't tell me that DNA mutation and natural selection is the basis of Biology if you can't explain how the life and the DNA came about in the first place. It's like being an "expert" on elephants trunk and having no concept of Elephants on the whole. That's what's going on here. Admit you don't know.
alsdyall 1 month ago
Just wondering, in the origin of life how could the transcription factors be there to transcribe for protein translation if they are proteins themselves, and had to have been synthesized by translation? I am studying to be a biologist and this confuses me, someone please help!
DrWilliams95 2 months ago
@alsdyall You'd have to clarify what you mean by "useful." I don't know if any practical applications have come from the study of abiogenesis, but on a theoretical level, scientists have developed a pretty strong framework for how life could have arisen. DonExodus2 has another good video on it.
coltharpnicholas 2 months ago
@alsdyall If "it" is the theory of evolution, then "it" is not interested, because "it" is an abstract concept incapable of feeling. "We" -- human beings -- certainly are interested.
Here is what I mean: evolution is a model for how life changes over time. The origin of life is a completely unrelated concept from a theoretical point of view. Imagine if someone criticized the theory of relativity for not explaining how the laws of physics arose.
coltharpnicholas 2 months ago
@alsdyall Think about rolling a die. Each individual roll is essentially random and impossible to predict. But over a large number of rolls, we can predict that each number will come up roughly the same number of times. Large-scale patterns frequently emerge from small-scale events which are essentially random.
Mutations are random; the fact that beneficial mutations tend to survive is not random.
coltharpnicholas 2 months ago
@coltharpnicholas Well that's the random I'm talking about which is pretty much half the so-called equation.
alsdyall 2 months ago
@coltharpnicholas What do you mean, 'outside of it's scope"? Is it not interested? or it doesn't know? or is that for the field of abiogenesis? Does abiogenesis say anything useful?
alsdyall 2 months ago
@alsdyall You keep using the word "random". Why? Evolution is not a "random" process. Yes, mutations are effectively random. However, mutations happen at the level of the individual; evolution is a large-scale phenomenon. There is nothing random about the fact that helpful mutations accumulate, while detrimental mutations generally do not.
"Darwinism" (which is not a thing) does not "avoid" the origin of DNA any more than physics does. It is simply outside of its scope.
coltharpnicholas 2 months ago