RE: By chance?
February 10, 2020 at 4:01 am
(This post was last modified: February 10, 2020 at 4:37 am by The Architect Of Fate.)
(February 9, 2020 at 1:20 pm)Fake Messiah Wrote:But what do all those biologists know(February 9, 2020 at 12:18 pm)Yukon_Jack Wrote: So someone here quoted
“The mutations may be random, the selection process is not. ”
Again, NS is wholly dependent upon 100% random mutations. Are you still denying this and calling me crazy? That’s rich
NS can only keep traits caused by 100% randomness and I know “evolution “ occurs over time
But tell me you find it normal happenstance
That a perfect set of owls eyes will appear?
I keep bringing this up because I want to know the logistics of how you fall for this crazy lucky coincidences.
If you're really interested in evolution of eyespots in butterflies, get some book about evolution. Like, here's what "The Princeton Guide to Evolution" says about it.
Quote:Artificial selection experiments have also been used to examine the flexibility of evolution in different directions of morphospace for two wing eyespots in this species of butterfly. Each eyespot pattern element consists of concentric rings of epithelial cells containing different-colored pigments. They are often arranged in an anterior to posterior column along the wing margins, and may then function in misdirecting the attacks of predators hunting by sight, away from the vulnerable body. A series of eyespots on the same wing surface behave as a module in which each eyespot is based on a central signal-diffusion system (or “organizer”) during development, and they all express the same set of genes during pattern determination. Thus, the eyespots represent a set of repeated elements exhibiting strongly positive genetic correlations for both eyespot size and color composition such that selection targeting either
trait for a specific eyespot in B. anynana yields corre-
sponding responses in the other eyespots (note that the
two eyespot traits show little, if any, genetic covariance).
A series of artificial selection experiments performed by
Patrı´cia Beldade examined whether repeated eyespots
can evolve independently. By simultaneously targeting
two different eyespots on the same wing, the experi-
ments explored the extent to which the pattern of eye-
spots, in terms of relative size or color composition, is
flexible in evolutionary terms; for example, with respect
to size, can two different eyespots be selected to both
either increase or decrease in size, and also for one to
become larger and the other smaller? A high flexibility in
the evolution of extreme, novel forms toward all four
corners of theoretical morphospace for this pattern was
observed for the pattern of relative eyespot size over 25 generations of selection. This result is consistent with
neither intrinsic constraints nor any strong bias in po-
tential responses to natural selection. This flexibility
of response in this experimental system appears to be
reflected in a full exploration of morphospace for the
same pattern when variation in the species-rich tribe of
butterflies is considered. In contrast, experiments on
eyespot color yielded very little response and no novel
phenotypes when two eyespots were selected in oppos-
ing directions. The different responses of the two traits
may be traceable to mechanisms of developmental reg-
ulation; whereas the size of each eyespot depends on the strength of the organizing “signaling” source at its
center, the regulation of eyespot color involves threshold responses to the signals and occurs at the level of the whole wing epidermis.
Jackoffs opinions (or the ones feed to him by ID propagandists ) are clearly superior which is why ID has replaced evolut....Oh wait
"Change was inevitable"
Nemo sicut deus debet esse!
“No matter what men think, abortion is a fact of life. Women have always had them; they always have and they always will. Are they going to have good ones or bad ones? Will the good ones be reserved for the rich, while the poor women go to quacks?”
–SHIRLEY CHISHOLM
Nemo sicut deus debet esse!
“No matter what men think, abortion is a fact of life. Women have always had them; they always have and they always will. Are they going to have good ones or bad ones? Will the good ones be reserved for the rich, while the poor women go to quacks?”
–SHIRLEY CHISHOLM