@Deeje
I have already addressed this question extensively. These conclusions are no longer even remotely tenable given the fossil record we have today. Once again it seems that the person here is using many decades old and highly incomplete fossil records.
Once again, we have an isolated out of context quote. How do I know its out of context? Because the same Malcolm S Gordon writes papers too on tetrapod evolution where his views are seen to be fully consonant with what I have been stating here.
http://www.journals.uchicago.edu/doi/full/10.1086/425183
Here is the abstract (i have access to the full paper):-
Recent discoveries of previously unknown fossil forms have dramatically transformed understanding of many aspects of the fish-tetrapod transition. Newer paleobiological approaches have also contributed to changed views of which animals were involved and when, where, and how the transition occurred. This review summarizes major advances made and reevaluates alternative interpretations of important parts of the evidence. We begin with general issues and concepts, including limitations of the Paleozoic fossil record. We summarize important features of paleoclimates, paleoenvironments, paleobiogeography, and taphonomy. We then review the history of Devonian tetrapods and their closest stem group ancestors within the sarcopterygian fishes. It is now widely accepted that the first tetrapods arose from advanced tetrapodomorph stock (the elpistostegalids) in the Late Devonian, probably in Euramerica. However, truly terrestrial forms did not emerge until much later, in geographically far-flung regions, in the Lower Carboniferous. The complete transition occurred over about 25 million years; definitive emergences onto land took place during the most recent 5 million years. The sequence of character acquisition during the transition can be seen as a five-step process involving: (1) higher osteichthyan (tetrapodomorph) diversification in the Middle Devonian (beginning about 380 million years ago [mya]), (2) the emergence of "prototetrapods" (e.g., Elginerpeton) in the Frasnian stage (about 372 mya), (3) the appearance of aquatic tetrapods (e.g., Acanthostega) sometime in the early to mid-Famennian (about 360 mya), (4) the appearance of "eutetrapods" (e.g., Tulerpeton) at the very end of the Devonian period (about 358 mya), and (5) the first truly terrestrial tetrapods (e.g., Pederpes) in the Lower Carboniferous (about 340 mya). We discuss each of these steps with respect to inferred functional utility of acquired character sets. Dissociated heterochrony is seen as the most likely process for the evolutionarily rapid morphological transformations required. Developmental biological processes, including paedomorphosis, played important roles. We conclude with a discussion of phylogenetic interpretations of the evidence.
The discovery of 375 mya Tiktallik in 2008 has added another level of detail in this very well-documented evolutionary sequence.
"What, though, of the fossils that are used to show fish changing into amphibians, and reptiles into mammals? Do they provide solid proof of evolution in action? Upon closer inspection, several problems become obvious.
First, the comparative size of the creatures placed in the reptile-to-mammal sequence is sometimes misrepresented in textbooks. Rather than being similar in size, some creatures in the series are huge, while others are small.
A second, more serious challenge is the lack of proof that those creatures are somehow related.
Specimens placed in the series are often separated by what researchers estimate to be millions of years. Regarding
the time spans that separate many of these fossils, zoologist Henry Gee says: “The intervals of time that separate the fossils are so huge that we cannot say anything definite about their possible connection through ancestry and descent.”
I have already addressed this question extensively. These conclusions are no longer even remotely tenable given the fossil record we have today. Once again it seems that the person here is using many decades old and highly incomplete fossil records.
Commenting on the fossils of fish and amphibians, biologist Malcolm S. Gordon states that the fossils found represent only a small, “possibly quite unrepresentative, sample of the biodiversity that existed in these groups at those times.” He further says: “There is no way of knowing to what extent, if at all, those specific organisms were relevant to later developments, or what their relationships might have been to each other.” (Excerpts from the brochure "Origins of Life" WTBTS)
Once again, we have an isolated out of context quote. How do I know its out of context? Because the same Malcolm S Gordon writes papers too on tetrapod evolution where his views are seen to be fully consonant with what I have been stating here.
http://www.journals.uchicago.edu/doi/full/10.1086/425183
Here is the abstract (i have access to the full paper):-
Recent discoveries of previously unknown fossil forms have dramatically transformed understanding of many aspects of the fish-tetrapod transition. Newer paleobiological approaches have also contributed to changed views of which animals were involved and when, where, and how the transition occurred. This review summarizes major advances made and reevaluates alternative interpretations of important parts of the evidence. We begin with general issues and concepts, including limitations of the Paleozoic fossil record. We summarize important features of paleoclimates, paleoenvironments, paleobiogeography, and taphonomy. We then review the history of Devonian tetrapods and their closest stem group ancestors within the sarcopterygian fishes. It is now widely accepted that the first tetrapods arose from advanced tetrapodomorph stock (the elpistostegalids) in the Late Devonian, probably in Euramerica. However, truly terrestrial forms did not emerge until much later, in geographically far-flung regions, in the Lower Carboniferous. The complete transition occurred over about 25 million years; definitive emergences onto land took place during the most recent 5 million years. The sequence of character acquisition during the transition can be seen as a five-step process involving: (1) higher osteichthyan (tetrapodomorph) diversification in the Middle Devonian (beginning about 380 million years ago [mya]), (2) the emergence of "prototetrapods" (e.g., Elginerpeton) in the Frasnian stage (about 372 mya), (3) the appearance of aquatic tetrapods (e.g., Acanthostega) sometime in the early to mid-Famennian (about 360 mya), (4) the appearance of "eutetrapods" (e.g., Tulerpeton) at the very end of the Devonian period (about 358 mya), and (5) the first truly terrestrial tetrapods (e.g., Pederpes) in the Lower Carboniferous (about 340 mya). We discuss each of these steps with respect to inferred functional utility of acquired character sets. Dissociated heterochrony is seen as the most likely process for the evolutionarily rapid morphological transformations required. Developmental biological processes, including paedomorphosis, played important roles. We conclude with a discussion of phylogenetic interpretations of the evidence.
The discovery of 375 mya Tiktallik in 2008 has added another level of detail in this very well-documented evolutionary sequence.
You should fire your "teachers" for feeding you outdated, misleading and false information.