G
good brother
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Thank you for your response but it did not address the part I had bolded originally. I think that part is a very important subject to address.
In Christ, GB
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Thank you for your response but it did not address the part I had bolded originally. I think that part is a very important subject to address.Opossums who ran away from predators were eaten at a higher rate than those who froze. This lead to the "freezers" leaving more offspring in the next generation.
So I am going to ask a follow up question to the OP (and I can because I posted the OP), How could opossums have evolved such a trait? I read on one fact page (Opossum Facts) about opossums that they don't actually play dead, they are frightened into an involuntary shock like state. This would make it a non-learned behavior. How would an involuntary, non-learned action mimicking dead things ever "evolve" into a living animal's defense mechanism reptertoire?
How would an involuntary, non-learned action mimicking dead things ever "evolve" into a living animal's defense mechanism reptertoire?
But how would that trait first appear? What would cause that trait to make itself manifest in an animal? How could such an involuntary, non-learned behavior become part of even the first opossum's defense mechanism repertoire?If the trait is genetically determined and provides an adaptive advantage, it will be selected for and increase in a population. Those with the trait survive to produce offspring, and the offspring inherit the trait. Those without the trait have lower fitness and produce fewer offspring. Eventually the population becomes dominated by those with the trait. This mechanism is called Natural Selection.
Here in my country we call the opposum "manicou".Only eight years after Columbus first set foot on American soil, an opossum entered the pages of recorded history. A Southern opossum from Brazil was the first marsupial to be brought to Europe. The explorer Vincente Pinzón presented her to King Ferdinand and Queen Isabella of Spain in 1500, and showed them the opossums young in her pouch. The monarchs called the opossum an incredible mother.2
Thank you for your response but it did not address the part I had bolded originally. I think that part is a very important subject to address.
In Christ, GB
But how would that trait first appear?
It only appears to be a mystery to those who don't understand evolution....The ever loveable, ever cute opossums would seem to present a mystery to evolution. Why and how would such a creature ever evolve the characteristic "playing opossum"? To stop mid chase and fall into a catatonic state seems to be a pretty lousy "defense mechanism". To a hungry predatory animal this would be fast food turned into sit down dining.
You are aware that opossums stink, and when they play dead they really stink.I know what you mean! Except for one thing. My dog is totally opportunistic. He used to drag over the "leftovers" of my neighbor's deer kills. It wasn't uncommon to have guts and bones strewn all over my yard. I'm sure that my other neighbors had suspicions!
Indeed.There are many species that "Freeze" rather than run. And more that use a combination of freezing to analyze the situation, then deciding to run at the most opportune time.
I think this is the first time I have seen you agree with an evolutinary standpoint.You're right. They are still around and are still thriving. If this wasn't an advantageous adaptation, it would have drove them to extinction.
Without being an expert in this area, I cannot be specific.How would an involuntary, non-learned action mimicking dead things ever "evolve" into a living animal's defense mechanism reptertoire?
DNA changes result in instinctual changes which are then selected for. In this case, the instinct to "play dead" when threatened was selected for because those with that DNA change had more offpsring than those who did not.
But many times when a mutation occurrs, the DNA will repair itself in subsequent generations. The DNA just doesn't mutate and stay mutated. It has it's own little back ups and safeguards to make sure that doesn't happen continually. That is built into it! So how would that happen and why wouldn't it just repair itself in future generations as it is designed to do?How any inheritable trait first appear which is through a DNA mutation.
Magic?But many times when a mutation occurrs, the DNA will repair itself in subsequent generations. The DNA just doesn't mutate and stay mutated. It has it's own little back ups and safeguards to make sure that doesn't happen continually. That is built into it! So how would that happen and why wouldn't it just repair itself in future generations as it is designed to do?
In Christ, GB
But many times when a mutation occurrs, the DNA will repair itself in subsequent generations. The DNA just doesn't mutate and stay mutated. It has it's own little back ups and safeguards to make sure that doesn't happen continually. That is built into it! So how would that happen and why wouldn't it just repair itself in future generations as it is designed to do?
In Christ, GB
But many times when a mutation occurrs, the DNA will repair itself in subsequent generations.
The DNA just doesn't mutate and stay mutated.
It has it's own little back ups and safeguards to make sure that doesn't happen continually.
Are you saying that there are no mechanisms that are involved in anything that might be known as DNA repair?Sorry pal but you don't seem to know much about genetics. Each human being you see on the street has 100-200 unique mutations in their DNA (you do too!) If there were no mutations or recombination events, there would be no variation in nature.
Point #1 of evolution: populations have varieties with different traits (mechanism: DNA mutations). Point #2: if one of these traits somehow confers a reproductive advantage, it ends up dominating the population (mechanism: natural selection).
Are you saying that there are no mechanisms that are involved in anything that might be known as DNA repair?
Are you saying that there are no mechanisms that are involved in anything that might be known as DNA repair?
Why is it that evolutionists pay no attention to DNA repair?
You were talking about mutations being repaired in subsequent generations. That is not something that happens with known DNA repair mechanisms. DNA repair mechanisms repair mutations as they happen -- most of the time. The ones that don't are the mutations we see. And if the mutation is in a germ cell, then it will be seen in the next generation.Are you saying that there are no mechanisms that are involved in anything that might be known as DNA repair?
Please, don't embarrass yourself. We (meaning biologists and geneticists) are well aware of DNA repair. (Who do you think discovered it?) It's a trivial fact that each generation has new mutations.It appears that there is a great number of safeguards designed into DNA to keep mutations from just going buck wild on a cell. Why is it that evolutionists pay no attention to DNA repair?
It only needs to occur once, in either the egg or sperm that makes that offspring. When you start with a single cell there is no back up. It is what it is. That organism starts with the mutations in that egg and sperm.
We are saying that these DNA repair mechanisms do not fix all of the mutations, and they have no way of going back to the last generation to fix mutations in offspring. We OBSERVE that children have mutations not found in their parents. This is true in all species.
That situation says nothing about mutations being repaired in subsequent generations. All it shows is that each parent has two copies of the relevant gene, and that they each have one short-stature copy and one normal-stature one(*), and that their form of dwarfism is dominant(**). Having a single mutant copy makes you short, but you still have a wild-type copy which you can pass on to your kids. In this situation, some children will have two normal copies, and have normal stature, while most will have one or more variant copies and have short stature(***).Have you ever seen the show on TLC called "Little People Big World"? It was about a husband and wife who are little people and it followed their daily lives and their family. They have two boys and one girl. One of the boys and the girl are "normal" size and the other boy is a little person. Now, even though both the parents have a mutation in their genes to make them be little people, that genetic trait was not passed on to two thirds of their offspring. So in response to your first post, even though both parents had that mutation to make them short, that did not pass on to but one of their offspring. In response to your second post, we find the children do NOT have the same mutation their parents had. An interesting fact aired once a week for several seasons.
But many times when a mutation occurrs, the DNA will repair itself in subsequent generations.
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