Chapter 1- Finding Your Inner Fish
1. The search, in 2004, was located in Northern Canada (Ellesmere Islands) and was based on looking in sedimentary rocks. They choose to focus on 375 million year old rocks for multiple reason. One of the biggest reason was to find a link between amphibians that didn't look like fish that were discovered in 365 million year old rocks and fish, without amphibian characteristics, were discovered in 385 million year old rocks.
2. The fossil Tiktaalik seemed like a big fish with scales on it’s back and fins with fin webbing. However, like other early land living animals it had a flat head and neck. Another thing this fossil showed was bones in it’s fins that correspond to the upper arm, the forearm, and even parts of the wrist.
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After further examining Tiktaalik’s fins many new things were revealed about it’s lifestyle. A big thing they noticed is how it was likely built to navigate the bottom of shallows of streams or ponds and go into mudflats along the banks. Another thing was that it in fact had a shoulder, elbow, and wrist composed of the same bones as the upper arm, forearm, and wrist in a human. Along with this they soon realized that both the elbow and wrist were capable of bending.
Chapter 3- Handy Genes
1. A large experiment that was done with chick embryos was when they took a patch of tissue from what will become the pinky side of a limb bud, and put it on the opposite side next to where the first finger would form. After the birth of the chick what they found amazed them. The wing had developed properly except it also had a full duplicate set of digits.
2. Hedgehog Gene: This gene make one side or part of the body look differently from the other. In our bodies this is shown in our hands. In animals however you see this in their fins or wings. For example when this was shown on sharks and skates the dorsal fin duplicated their structures in a “front to back pattern”.
Chapter 4- Teeth
There is common plan for all limbs: one bone, followed by two bones, then a bunch of little bones, and finally digits. This array of bones is seen in many species including, but not restricted to bats, whales, and lizards. But how do these limbs develop and why do they all look similar? Shubin explains it by conveying that there are certain genetic switches that help assemble who we are. When scientists went looking for this genetic switch in limbs, they found a couple tissue areas in the limbs that allow this body plan to occur. “A strip of tissue at the extreme end of the limb bud is essential for all limb development…This patch of tissue was named the zone of polarizing activity (ZPA).” ZPA allows humans to have opposable thumbs and pinkies. In other organisms, it differentiates the “thumb” side from the “pinky” side. Scientists then wanted to discover the molecule that allowed this changen in the ZPA, the answer is Sonic hedgehog. Shubin points out that every limbed animal h...
Although the Hippocampus spp. are placed into the same class as other organisms more traditionally viewed as fish, their morphology bears distinct differences in comparison to other bony fish. The various species belonging under the genus Hippocampus range in maximum size from 20 mm to 300 mm(Foster 8). Their physical appearance is distinct from other members of its class due to their "horse-like head, monkey-like tail, and kangaroo-like pouch."( Lourie et al 12) Morphologically, seahorses do not have scales like traditional fish, but rather posses bony plates covered by skin. The appearance of bony extrusions and skin ...
If you were to live during the tertiary period, this would be one of the things you would often see. All of the mammals that existed during that time period were terrestrial. They all were land dwelling mammals. Before J. G. M. Thewissen and colleagues’ discovery in Pakistan, many scientists believed, since the constant new discoveries twenty years ago, in what the numerous fossils from North America, Pakistan, and Egypt have revealed, “…these early cetaceans had mobile elbows and external hind limbs with articulated knees. However, they were fully aquatic, except for Ambulocetus, which was amphibious-much like sea lions” (Walking with Whales).
Seahorses are elongate with rigid body armor and swim upright. Pectoral fins on the sides and a small dorsal
In conclusion, Tiktaalik roseae is a lobe fin fish with traits that shows the gradual process of transitioning from life in water to land. Their structure and unique traits are the evidence that Tiktaalik were relatives of Ichthyostega. Even though they had fins and scale as a fish, Tiktaalik also resemble a tetrapod amphibian with a neck, flat head, skull, ribs, elevated eyes, and air sacs. Therefore, the discovery of Tiktaalik was an improvement that proves how life on land became possible for vertebra.
One sunny day during the summer of 2008, my uncle called me and asked if I wanted to go fishing with him. I said that I’d love to go; he told me that he’d pick me up around 12:30. I got ready and left to go fishing. When we arrived at the pond a man came out of the in front of the house in front of the pond and introduced himself. He said that his name was Tim and that he works with my uncle. Before he left, he told us that we could fish as long as we wanted and he vanished.
Bipedalism is one of the most common traits used when identifying what distinguishes what a human is. However, humans are not the only species that exhibit this trait. There are numerous species besides humans that exhibit bipedalism that are currently living or that have become extinct. Bipedalism has been an important trait for humans and their past ancestors since bipedalism is a very primitive trait that has evolved quite some time ago. Currently, there is no specific answer as to why bipedalism emerges but there are numerous hypotheses and these hypotheses will be examined in this paper. This paper will also identify the different signs that indicate whether or not a species is bipedal.
Blackfish tells the story of Tilikum, a performing killer whale that killed several people while in captivity. Blackfish tells the story of Tilikum, a performing killer whale that killed several people while in captivity. Along the way, director-producer Gabriela Cowperthwaite compiles shocking footage and emotional interviews to explore the creature’s extraordinary nature, the species’ cruel treatment in captivity, the lives and losses of the trainers and the pressures brought to bear by the multi-billion dollar sea-park industry. In black fish the information they used is misleading and untruthful and is meant to pull at your emotions.
The dolphin is quite interesting. They have a high and falcate (curving) dorsal fin. The flukes from tip to tip are up to twenty-four inches long, or two feet long. ...
Up until 1947, it was believed that the Cambrian Explosion marked the first true abundance of multicellular life. However, this was discovered to be untrue after Sir Douglas Mawson and R.C. Sprigg mistakenly came across numerous "fossil jellyfish" in the Ediacara Hills while observing what was originally believed to be sandstones belonging to the lowest strata of the Cambrian. At first, these finding were dismissed as "fortuitous inorganic markings."(AAS Biographical Memoirs.) Several years later however, other discoveries of segmented worms, worm tracks, and impressions of two other assemblages that bear no resemblance to any known organism, living or extinct, prompted the South Australian Museum and the University of Adelaide to undertake a joint investigation of the region. Further studies by M. F.
Fishing is one of my favorite hobbies for the uncertainty and excitement it brings to me. It was a cold morning in the month of June we began our journey. My family and I embark on our trip to go on a fishing trip to Iowa City.
I have two firearms because if one firearm breaks I have a backup and I can also fire from to angles. I have two axes Incase some break and to chop down different trees at the same time. I have one horse so there can be travel and the horse can help with bringing in fish, water, and even food. I brought pots, pans, and a stove to cook and boil water. I brought cloth to make extra clothes. I brought three shovels for farming and Incase some break. I brought three things of fishing gear so that I can have more people fishing for a chance to get more fish. I brought two plows so I can work on two fields at the same time. I brought five packages of seeds so I have enough seeds for each season. I brought ten ropes so that I can tie together
I am not a very good fisher, and I don't necessarily like it a that much, to be honest it’s pretty boring, I don't know how fisherman do it. But sometimes me and my brother would fish, just to pass the time. Are parents were always hanging out with there friends on the beach— they were pretty much partying—.
In 1977 a Japanese trawler had allegedly netted a plesiosaur carcass. After carefully analysing the carcass, it revealed itself as a dead basking shark. They Japanese trawler then revealed it as a comparable phenomenon in decomposing basking shark carcasses. He revealed that the shark body would lose most of the lower head area and the dorsal and caudal fins first, making the dead carcass look like a plesiosaur.
bird. Do humans need to have the same kinds of bones as fish to swim?