The Neck of the Giraffe

@kellyjay said
How do you believe natural selection causes changes in DNA?

If its an easy thing to defend than why are you not defending it? You are
suggesting creatures activity can/will affect the gene pool by altering DNA to
grow a neck into a very large length, while in others it will not do it to all.

Natural selection is a good filter, it can take the gene pool of the strong and over
time eliminate the gene pool of the weak. That isn't directing mutations to create
anything, it isn't directing anything other than pushing forward what is there so
that which is best suited more forward in time while the rest cannot.

So tell me how would an activity alter a mutational change in DNA? Do baseball
players become better baseball players by feature altering mutational changes in
DNA, what would cause them to be altered in some way genetically that wasn't
there before people started playing baseball? Granted it isn't eating higher up the
tree's fruit, but anything that eats fruit doesn't actually measure how high off the
ground it is before eating it. So why would all of those creatures that could get
plenty of fruit lower to ground not also get longer necks? It isn't like the fruit
itself is any different from that which is higher off the ground than what is lower?

Why would this alter DNA in any way shape or form?

"But the initial selection of longer
necked giraffes would have been due to a feeding advantage THEN (when the necks
became weapons) there would also have been pressure on longer necks for fighting."

@wolfgang59 said
How can one man be so ignorant?

Research what you are arguing over then ask the questions.
Natural Selection does not cause changes in DNA.
(and monkeys don't give birth to humans)

@kellyjay said
How do you believe natural selection causes changes in DNA?

@kellyjay said
I've read both and still the issue is that what you are suggesting. Alterations due
to activities are being pushed into DNA causing specific changes in the code.

@kellyjay said
You are
suggesting creatures activity can/will affect the gene pool by altering DNA to
grow a neck into a very large length, while in others it will not do it to all.

@wolfgang59 said
I do not.
Nobody does.

@wolfgang59 said
No they are not.
An animals environment does not cause beneficial changes in dna.
The environment determines which changes will survive.

Read "The Selfish Gene"

@wolfgang59 said
No I'm not.

If members of a species have better access to food due to a longer neck then
those members will survive longer, breed better and have more offspring
with the same trait. Nature selects what genetic changes will survive.

@kellyjay said
I agree environment acts as a filter which determines which changes survive, nothing
about that prompts one change over another. It only weeds out what doesn't have
it to survive out.

@kazetnagorra said
How does selecting beneficial changes not prompt changes?

@kellyjay said
Its the matter of what comes first, the cart or the horse. As we have agreed that
if something has an advantage that advantage will allow it to strive and thrive
before those that don't. In the long run that may make the difference, only if there
is a difference to be made.

So actions in this world such as eating from the higher branches of a tree, would
not present i ...[text shortened]... ome
type of change.

If the changes are not before the benefits there is nothing there to select.

@kellyjay said
So what was going on with giraffes in their eating and fighting had nothing to do
with changes?

@kellyjay said
I agree environment acts as a filter which determines which changes survive, nothing
about that prompts one change over another. It only weeds out what doesn't have
it to survive out.

@kellyjay said
Why again, longer necks don't change the food supply, nothing about eating from
the higher parts of tree will cause alterations within DNA? You honestly think that
for some odd reason for however long it took for longer necks to appear something
would prohibit animals from eating from the lower branches of trees? What do
you think took place, a million year old lower branch on trees lack of fruit drought?