I love gospel... Evidence of cross-species evolution? My uncle told me the other day that there is no evidence of evolution between species. He does believe in evolution over long periods of time, but he insisted that there was no ...show more Best Answer Paul Jackson answered 2 years ago It is obvious that species emerged at different times and some went extinct. If you believe otherwise then you have to believe that every species that is alive today was around forever. We know from the fossil record that this is not the case. For instance, we find fossils of primitive fish and mollusks in rock deposited during the Ordovician period, but no dinosaur or mammalian fossils. More modern fish begin to appear in the Silurian period. Still no land animals or plants. By the Devonian period land based life started to appear. We dont find any dinosaur fossils until the Triassic period some 50 million to 100 million years later. If all the species co-existed throughout all of lifes history, why dont we find fossils of modern species in the early fossil record? Ive confined my discussion to the fossil record. Heres some evidence from genomics: Source: see ucmp.berkeley.edu/help/timefo... 10 Comment Other Answers (6)Relevance DANIEL answered 2 months ago Rational is the word I keep seeing in every discussion of evolution. I rationally cant say that just because there were only fossil records of certain species found, in any given time frame that a major evolutionary event has happened. We have never found any hard evidence of transitional species. 00 Comment Divi answered 11 months ago Paul Jackson, your fossil record analysis also supports the theory of creationism. Creationists believe that species appeared over a long time period. Most creationists also believe in limited evolution. Intelligent, open-minded people have room in their belief system for both views. Why do strict evolutionists feel the need to exclude other beliefs? 00 Comment gardengallivant answered 2 years ago Im not sure if you are asking for speciation where one species branches and two species are descendents from a single ancestral population or if you are asking if two closely related species can hybridize to produce a third different species. An example of speciation branching is with the Croatian ruin lizards (Podarcis sicula) that have diverged in diet, running speeds, body morphology and social behavior in 40 generations of isolation on the island Pod Macaru, while the parent population remains the same on their home island. Genomic analysis shows these isolated lizards have not hybridized with other near species to acquire this trait by cross breeding. scienceblogs/pharyngula/2008/... scienceblogs/grrlscientist/20... Adaptive changes reported sciencedaily/releases/200... National Geographic article reporting the shift news.nationalgeographic/news/... Bottlenecks and Founder Effects: evolution.berkeley.edu/evosite/ev... “Rapid large-scale evolutionary divergence in morphology and performance associated with exploitation of a different dietary resource.” Herrel, A. et al. Proceedings of the National Academy of Sciences USA 105: 4792-4795. 2008. pnas.org/content/105/12/4792.... Close species typically hybridize for a period before divergence makes this impossible but because the progeny has intermediate traits they cannot compete with either parent in their respective habitat. Occasionally a new niche opens providing a space the hybrid can fit better than either parent. Pennsylvania blueberry fly and the snowberry fly produced a hybrid lonicera fly whose maggot was able to move onto to the introduced Asian honeysuckle as a niche of their own. These fly hybrids likely formed many times before the honeysuckle was introduced but now there is a plant that offers a habitat that only the hybrid can use efficiently. 100 generations have passed and the hybrid is established as a new species, while the two parent species continue and remain in their original ecological niches. nature/nature/journal/v43... newscientist/article/dn77... :-) https://answers.yahoo/question/index?qid=20120629173009AAoresK
Posted on: Thu, 02 Oct 2014 21:01:08 +0000
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