Inner Fish Chapter Summary
INNER FISH CHAPTER 1
1. The author and his colleagues wanted to use 375 million old rock, because in the 385 million year old rocks they found what look like fish. In the 365 million year old rocks they found amphibians that did not look like fish, so to find the change the look at the 375 million year old rock to find transition between the two. In their paleontology work in 2004 they found sedimentary rocks in Pennsylvania and on the east coast of Greenland, but their most successful rock was found in the Artic of Canada.
2. The fossil Tiktaalik has a flat head with eyes on top, it is similar to an alligator. Tiktaalik also looks like a fish because of the scales and fins. This fossil confirms prediction because the fish contains a part of us.
3. Neil Shubin thinks that Tiktaalik says something about our own bodies, because of the neck. In Tiktaalik “the head is completely free of the shoulders” (26). The fish before Tiktaalik had bones connected the skull and the shoulders together. The arrangement is shared with other animals and humans. Shubin believes that this fossil is a part of our history.
Dispute:
If this statement was true, humans would have the answer …show more content…
However, the gill arches during the embryonic stage create similar structure in use, not appearance. The first gill arch creates “the trigeminal nerve in both humans and sharks” (Shubin 91). The cells of the second gill arch gives us cartilage and muscle that helps the creation of the stapes, as well as another bone, the hyoid, that assists in swallowing. In a shark, the same arch “helps with jaw production” that compares to hyoid (Shubin 92). In the third and fourth gill arch, for humans it produces structures necessary for speech and swallow and for sharks it includes parts of tissues that support the gills. Sharks and humans have gill arches in the embryonic stage, but unlike the statement proposes, they do develop into related structures in each
1. The author and his colleagues wanted to use 375 million old rock, because in the 385 million year old rocks they found what look like fish. In the 365 million year old rocks they found amphibians that did not look like fish, so to find the change the look at the 375 million year old rock to find transition between the two. In their paleontology work in 2004 they found sedimentary rocks in Pennsylvania and on the east coast of Greenland, but their most successful rock was found in the Artic of Canada.
2. The fossil Tiktaalik has a flat head with eyes on top, it is similar to an alligator. Tiktaalik also looks like a fish because of the scales and fins. This fossil confirms prediction because the fish contains a part of us.
3. Neil Shubin thinks that Tiktaalik says something about our own bodies, because of the neck. In Tiktaalik “the head is completely free of the shoulders” (26). The fish before Tiktaalik had bones connected the skull and the shoulders together. The arrangement is shared with other animals and humans. Shubin believes that this fossil is a part of our history.
Dispute:
If this statement was true, humans would have the answer …show more content…
However, the gill arches during the embryonic stage create similar structure in use, not appearance. The first gill arch creates “the trigeminal nerve in both humans and sharks” (Shubin 91). The cells of the second gill arch gives us cartilage and muscle that helps the creation of the stapes, as well as another bone, the hyoid, that assists in swallowing. In a shark, the same arch “helps with jaw production” that compares to hyoid (Shubin 92). In the third and fourth gill arch, for humans it produces structures necessary for speech and swallow and for sharks it includes parts of tissues that support the gills. Sharks and humans have gill arches in the embryonic stage, but unlike the statement proposes, they do develop into related structures in each