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How would an adherent to punctuated equilibrium explain the lack of intermediate links in the fossil record?
Wiki User
∙ 12y ago
Where are you people getting these ill posed questions? What level? Transitional forms!
At the species level this would be explained as a rapid (geologically rapid) speciation event followed by years of stasis, where little morphological change is taking place.
Wiki User
∙ 12y ago
Wiki User
∙ 14y ago"Intermediate links " at the SPECIES level. That is what the theory attempts to explain; stais and rapid evolution.
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Can you compare and contrast gradualism and punctuated equilibrium?
punctuated equilibria accounts for the gaps in the fossil record. Species evolve quickly during relatively short periods. Tiny changes in a species gradually add up to major changes over very long periods of time. Gradualism proposes that evolution occurs slowly but steadily. These periods of rapid change are separated by long periods of little or no change.
How is the punctuated equilibrium a better model for dealing with gaps and missing links in fossil records?
Answer: The late evolutionary professor of Palaeontology Stephen Jay Gould, proposed an evolutionary theory called 'punctuated equilibrium' to explain the evidence he found in the fossil record. His theory essentially meant that evolution proceeded by 'jumps' rather than gradually as Darwin proposed.The evidence was the fact (still the case today), that the many intermediate forms that are required by evolution to proceed in the standard Darwinian manner just do not exist. Gould once stated that 'The extreme rarity of transitional forms in the fossil record persists as the trade secret of paleontology. The evolutionary trees that adorn our textbooks have data only at the tips and nodes of their branches … in any local area, a species does not arise gradually by the gradual transformation of its ancestors; it appears all at once and "fully formed." (Stephen Jay Gould, Evolution's erratic pace, Natural History 86(5):14, May 1977.)The idea was that these 'jumps' occurred in small isolated populations which were thus not as likely to be fossilised. Thus Gould together with Niles Eldredge, explained the large, seemingly unbridgeable gaps in the fossil record, the study of which he was an expert.
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Charles Darwin's thoughts on evolution would correspond to punctuated equilibrium?
Punctuated Equilibria is a theory proposed by Stephen Jay Gould and Niles Eldredge to explain patterns of speciation in the fossil record. They pointed out that the record seems to show most species undergo long periods of relatively little change (stasis), then undergo rapid bursts of change at irregular (punctuated) intervals. Evolution did not seem to proceed at a stately, constant, slow speed. Gould and Eldredge explained this by taking the standard idea of how species form (allopatric speciation, or speciation in small isolated groups at the periphery of populations) and showing that this process would produce exactly the pattern which is observed in the fossil record. Essentially, evolution and speciation can occur rapidly in small isolated populations, sometimes too quickly for the fossil record to track all of the intermediate forms. The result is what looks like abrupt emergence of forms with little or no transitional stages, when in reality the evolution had occurred through intermediate stages, only too quickly for the slow process of fossilization to capture it.
Can you compare and contrast gradualism and punctuated equilibrium?
punctuated equilibria accounts for the gaps in the fossil record. Species evolve quickly during relatively short periods. Tiny changes in a species gradually add up to major changes over very long periods of time. Gradualism proposes that evolution occurs slowly but steadily. These periods of rapid change are separated by long periods of little or no change.
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