, Which of the following is not a scientifically accepted statement about the occurrence of transitional forms in the fossil record? , A. , Transitional forms are missing from many lineages, and especially from rarely fossilized lineages. B. , Transitional forms are known from many lineages, and especially from commonly fossilized lineages. C. , Evolutionary theory shows that many lineages should have developed without transitions. D. , Evolutionary theory shows that transitional forms should have occurred, and so should be found in the fossil record if they were fossilized. E. , Transitions between some older and younger fossil types have not been found because evolution occurred in small populations, and fossilization is less likely in smaller populations. , Points Earned: , 1/1 Correct Answer: , C Your Response: , C 10., The great extinction at the end of the Paleozoic Era that changed the living types on Earth and made way for the origin of dinosaurs during the Mesozoic Era occurred about:, A., 2,250,000 years ago. B., 22,500 years ago.C., 22,500,000,000 years ago.D., 225,000,000 years ago.E., 225,000 years ago. Humans were trotting around 22,500 years ago. 225,000 years is barely enough time for evolution to have changed large animals a little bit, and although 2,250,000 years is enough time for noticeable change of large animals—increase in maximum size of members of the horse family, for example—the huge changes since the dinosaurs consumed a good bit more than 22,500,000 years (dinosaur extinction was about 65,000,000 years ago). The end of the Paleozoic Era and start of the Mesozoic Era came before that, and 225,000,000 years is about right. 22,500,000,000 years is more than the age of the Earth, and so doesn’t work very well. , Points Earned: , 1/1 Correct Answer: , D Your Response: , D
, 11., Dr. Randall Irmis is a famous paleontologist, who has gone on to make important discoveries since he showed the Penn State CAUSE class this fossil plate from the armored vertebrate Buettneria. Based on the discussions in the textbook and lecture on the topic of evolution, it is likely that:, Evolutionary theory indicates that living things change from generation to generation, but that all living things are related. Consistent with this, Buettneria is recognizably similar to, yet different from, amphibians still alive today.
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