With the first unit behind us, the time has come to move onto the next unit. With great involvement in the development of fossils, it seems that the once-Biology class has turned into a Paleontology review course. There was discussion about evolution on a basis involving the earliest of life forms. There was quite a bit of talk, also, about a "common ancestor" from which many animals evolved. It is possible, considering that the homology stands for itself. Some animals have the same arm structures that humans do, differing only by a webbed hand than one with distinct digits. Through some of the images that were shown in the book "Your Inner Fish", it seems like a very plausible solution.
We discussed the Tiktaalik and its role as a transition between sea-dwelling creatures and land dwelling creatures. As seen during the amazing field trip to the Raymond M. Alf Museum of Paleontology, the fossil of this ancient creature has structures matching those of fish (scales, fins, etc.) and those of amphibians (flat head, wrists, etc.). It is shown transitioning onto land in the museum exhibit, suggesting that it was able to traverse both.
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