It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Thank you.
Some features of ATS will be disabled while you continue to use an ad-blocker.
Originally posted by Apass
mmm...or maybe like ...a disease on the bark of the trees, or maybe something like the moss......indeed, a very lifeless appearance....
Originally posted by mattison0922
But in any case, you were going to point out the ways in which lichen are similar to differentiated tissue, not quiz me on some vague hypothetical perception.
Lets there were 2 types of cells in a symbiotic structure so strong that they could not leave separately and there was a corss-breeding between them. The new cell could have been the very first of the multicellular organisms.
The point was that different types of cells can form structures that resemble organisms.
Originally posted by Apass
Lets there were 2 types of cells in a symbiotic structure so strong that they could not leave separately and there was a corss-breeding between them. The new cell could have been the very first of the multicellular organisms.
The point was that different types of cells can form structures that resemble organisms.
Originally posted by Apass
OK, lets say I'm wiling to except something that I "dream" as being evidence (also Einstein "dreamed" that he could see his face in the mirror normaly even if would travel with a speed very close to that of light...), but if it is not an evidence,
how would you describe in terms of ID tissue differentiation and embryo evolution? Just curious about that.
As for tissue differentiation in my example that could be triggered by an external factor, such as scarce food, "predators", temperature... whatever. It is not necesary that the tissue differentiation in the very first living creature that made the transition from colony/symbiosys to a multicellular organism should be so complex as for the humans.
The first multicellular organism had probably only 2 types of cell - something like a derma for protection and a body. And derma differentiation, like I said, could be triggered by the presence of "predators"...
Originally posted by mattison0922
I do appreciate comparing yourself to Einstein it was a nice touch, and I got a good laugh.
What specific predictions, etc. ID would make are dependent on the specifics of the system being studied and the question being asked.
With respect to embryos, they would be described for what they are, and again specific predictions can be offered when a more specific system or question is highlighted.
So you're saying tissue differentiation is analogous to responding the external environment?
The triggering mechanisms for the plasticity of bone marrow-derived stem cells seemed to be an insufficient pool of stem cells intrinsic to this tissue in concert with an increased demand for the production of new cells and changes in the microenvironment as a result of tissue injury at the site
source
And there is how much evidence to suggest that this is the case? Oh yeah... no real evidence, just thoughts running through your head.
The simplest extant (currently living) multicellular organisms, sponges, consist of multiple specialized cellular types cooperating together for a common goal
Though the different cell types create an organized, macroscopic multicellular structure—the visible sponge—they are not organized into true interconnected tissues. This is illustrated by the fact that a sponge broken up in a blender will reaggregate from the suviving cells. If individually separated, however, the particular cell types cannot survive alone
source
Widespread use of antibiotics is thought to have spurred evolutionarily adaptations that enable bacteria to survive these powerful drugs. Other microbes such as viruses, fungi, and parasites have developed resistance as well. Antimicrobial resistance provides a survival benefit to microbes and makes it harder to eliminate infections from the body
A key factor in the development of antibiotic resistance is the ability of infectious organisms to adapt quickly to new environmental conditions. Bacteria are single-celled organisms that, compared with higher life forms, have small numbers of genes. Therefore, even a single random genetic mutation can greatly affect their ability to cause disease. And because most microbes reproduce by dividing every few hours, bacteria can evolve rapidly. A mutation that helps a microbe survive exposure to an antibiotic will quickly become dominant throughout the microbial population.
random link
[crocodiles] Sex is also determined by nest temperature - males are produced around 31.6° Celsius. Any deviation from that temperature will result in a female hatchling.
random link
Originally posted by Apass
OK, take the human embryo. Why tissue differentiation takes place in the way it does?
Why in its early stages of development, the human embryo has a tail? Why dolphin embryos have fingers?
In the first creature it could have been. What is the case today? Who activates those swithes?
The triggering mechanisms for the plasticity of bone marrow-derived stem cells seemed to be an insufficient pool of stem cells intrinsic to this tissue in concert with an increased demand for the production of new cells and changes in the microenvironment as a result of tissue injury at the site
source
(bold mine)
Take the sponges:
The simplest extant (currently living) multicellular organisms, sponges, consist of multiple specialized cellular types cooperating together for a common goal
Though the different cell types create an organized, macroscopic multicellular structure—the visible sponge—they are not organized into true interconnected tissues. This is illustrated by the fact that a sponge broken up in a blender will reaggregate from the suviving cells. If individually separated, however, the particular cell types cannot survive alone
source
Ok, it's not exactly what I said, but it's close enough. If you do not want to make the connections, you're free to do that.
Another good example of adaptation/evolution taking place under our own eyes is the development of resistance to antibiotics
Widespread use of antibiotics is thought to have spurred evolutionarily adaptations that enable bacteria to survive these powerful drugs. Other microbes such as viruses, fungi, and parasites have developed resistance as well. Antimicrobial resistance provides a survival benefit to microbes and makes it harder to eliminate infections from the body
A key factor in the development of antibiotic resistance is the ability of infectious organisms to adapt quickly to new environmental conditions. Bacteria are single-celled organisms that, compared with higher life forms, have small numbers of genes. Therefore, even a single random genetic mutation can greatly affect their ability to cause disease. And because most microbes reproduce by dividing every few hours, bacteria can evolve rapidly. A mutation that helps a microbe survive exposure to an antibiotic will quickly become dominant throughout the microbial population.
random link
edited to add:
How does ID explains that?
[crocodiles] Sex is also determined by nest temperature - males are produced around 31.6° Celsius. Any deviation from that temperature will result in a female hatchling.
random link
Originally posted by melatonin
I'm trying to figure what is the point of bringing in the issue of the production of sulphates when we are focusing on the nature of fossils? The major reason we think of the KT boundary period as involving an extinction event is the fact we have fossils of dinosaurs below KT, but they do not occur above it. Something happened during that period.
Originally posted by bothered
I was refering to the process of mineralization in the presence of an acid. This should have led to the preservation of the tissues structure, not just a pile of bones.
Also, the shaping of the bones in fabrication these days does not seem to allow for the buoyant force, which is greatest at the bottom of a system. The bones in production these days tend to taper at that locale, and do not seem capable of supporting a rapid change in direction. If there were no deflection in the force introduced by shifting fluids/tissues/connected bones, I would assume a break.
And there is how much evidence to suggest that this is the case? Oh yeah... no real evidence, just thoughts running through your head.
Originally posted by ID_is_a_Fraud
Holy sweet baby jesus! Too bad there isn't a hypocrit award on ATS, youd've won it for this one. Your knocking down this guy and yet claiming ID is a valid science WITH NO EVIDENCE of ANYTHING being DESIGNED!
Get off the soapbox, it's not reserved for hypocrits.
Originally posted by ID_is_a_Fraud
Ah, but I never did say you said there was any evidence for design. You and other IDist's do think IDism (READ: CREATIONISM) is a valid science right upto par with evolutionary theory and should be taught side by side.
This is where the hypocracy steps in my friend. Your knocking down this guy's "inference" through lack of evidence and yet fully believing that your "inference" without evidence is just as valid as something WITH evidence. The idiocy just astounds me when it come's to IDist's. Changing definitions to include the supernatural does not a science make.
Originally posted by mattison0922
Really? Hmmm...news to me, especially since I'm on record dozens of times in this forum stating that ID SHOULDN'T be taught in public schools.
Regardless of what you think about if it should/shouldn't be taught in school, your still knocking down this guy's thought's due to lack of evidence and yet trying to pass of IDism as a legitimiate scientific front that has literally no evidence at all to back it up. Is faulty by nature. Does nothing more then poke at the hole's in what we don't know or have not yet discovered. Your a hypocrit. You should be ashamed of yourself. Seriously honestly ashamed.
No one's changed the definition of anything. You have no idea what my inference is.
Really? Seem's strange that the mighty dimwit Behe himself acknowledge's that this other, you know ... non existant definition of science allow's for thing's such as alchemy, astrology, magic and a whole host of other "supernatural" and/or psuedoscience explanation's to be just as valid as TRUE science. Along with ID of course.
Originally posted by ID_is_a_Fraud
Regardless of what you think about if it should/shouldn't be taught in school, your still knocking down this guy's thought's due to lack of evidence and yet trying to pass of IDism as a legitimiate scientific front that has literally no evidence at all to back it up.
Is faulty by nature. Does nothing more then poke at the hole's in what we don't know or have not yet discovered.
Your a hypocrit.
You should be ashamed of yourself. Seriously honestly ashamed.
Really? Seem's strange that the mighty dimwit Behe himself acknowledge's that this other, you know ... non existant definition of science allow's for thing's such as alchemy, astrology, magic and a whole host of other "supernatural" and/or psuedoscience explanation's to be just as valid as TRUE science. Along with ID of course.
Originally posted by mattison0922
Originally posted by ApassOK, take the human embryo. Why tissue differentiation takes place in the way it does?
It's due to influence of various hormonal and genetic factors.
Surely you're not going to come back with a statement akin to 'ontogeny recapitulates phylogeny.'
Why in its early stages of development, the human embryo has a tail? Why dolphin embryos have fingers?
The reason it sticks out in an embryo such as the one you show (what is it about 1 month?) is because the rest of lower body is as of yet undeveloped. So it's part of the developmental process.
De même, la disparition de l'appendice caudal, chez le f?tus humain, et dû à ce phénomène d'apoptose.
source
Au cours de la 5e semaine l'existence d'une «queue embryonnaire» atténuée est caractéristique.
Cet appendice caudal va régresser entre la 6e et la 8e semaine.
www.embryology.ch...
L'appendice caudal va régresser complètement à la fin de la 8e semaine.
www.embryology.ch...
The 'fingers' or I suppose more technically phalanges, are part of the dolphins... flipper - though I am unsure if 'flipper' is technically correct.
There certainly is some speculation that this homology is due to common descent, and this may very well be, in any case, common descent is perfectly compatible with ID.
The triggering mechanisms for the plasticity of bone marrow-derived stem cells seemed to be an insufficient pool of stem cells intrinsic to this tissue in concert with an increased demand for the production of new cells and changes in the microenvironment as a result of tissue injury at the site
source
(bold mine)
You are of course aware that 'microenvironment' in this case refers to intraorganismal environment, IOW, inside the organism, and not in response to external stimuli.
[crocodiles] Sex is also determined by nest temperature - males are produced around 31.6° Celsius. Any deviation from that temperature will result in a female hatchling.
This innovation occurs after the process of tissue differentiation has more or less occured. While it's true that the gonad tissue isn't mature, it has distinctly differentiated itself to gonad tissue.... IOW gonad tissue is differentiated.
Take the sponges:
Yep sponges are pretty cool. I do have to admit that much. They are freaks, and posses many anomalies as far as animals are concerned.
In my personal opinion, sponges are not likely to be ancestors of animals, and don't even belong in the same kingdom.
Though your statement about the cells not being able to survive individually isn't entirely true. If it were the sponge wouldn't be able to bud, and many sponges in fact reproduce via oviparous fertilization, necessitating the ability to survive away from the organism
Originally posted by Apass
Correct, but that's not the answer for my question. This is HOW it's happening, not WHY it is happening like it happens.
No, at least not in the classic sense because that's not correct.
Indeed, the lower part of the body si not developed but you can see the buds in my picture (wich is a fetus around 5 weeks).
But that "tail" is in fact a tail. (In french literature is called something like tail appendix - "appendice caudal"). And by the end of the 8th week is gone through apoptosis. (sorry, but for this I have links only in french (go to altavista's babelfish for a translator) because it seems that the english speakers like only the formation of fingers...)
(translation: in the same time, the disappearance of the human fetus' tail appendix is caused by apoptotic phenomenon)
-The existance of an embryonic tail is characteristic for the fifth week . This tail appendix will regress between the sixth and the eighth week.... -The tail appendix will regress completly by the end of the eighth week)
So it seams that for some it is a tail after all. A tail that we don't need but yet we get it during embryo evolution. Why? (in ID terms)
From the evolution point of view we (or at least we who believe in evolution) understand why it is happening like that. But if the dolphin needs a fin and not a hand...then why in ID terms the phalanges need to develop first and not in the same time with the fin?
Just to understand. How would look like this common descent?
Hmmm...yes, but again this is not a complete answer. Intraorganismal enviroment is not internal for the stem cells themselves. For the stem cells themselves microenviroment is external enviroment. It's not the stem cells who trigger the response of the organism to a injury. In fact, the response of the organism triggers stem cells differentiation.
That's like saying the tissue differentiates into bones muscles and gonads, forgeting that radius bone is not a phalange (same tissue type but not the same tissue) or that stomach muscles are not cardiac muscles (different tissue type). The gonads are also of 2 types - those who produce male gametes and those who produce female gametes. The undifferentiated gonad tissue of crocodiles differentiates and sets the final sex becasue of the nest temperature.
That's convenient to say that. In this way you don't have to deal with them any more. However, even if they are not in the same kingdom as animals, they fit evolution quite well...if you want to make the connections (that evolutionists "dream").
Why it wont be able to bud? And for oviparous fertilization you don't need regular sponge cells. You need sperm and eggs. My link said nothing about the ability to survive for the sperm and the egg. The link said regular sponge cells can not survive alone.
As for the antibiotic resistence, OK, it sounds plausible also in ID terms.