The Evolution Of Sharks

Sharks now are a lot more dominant than they were before, seeing something put up a fight with a great white is very rare. Most sharks are carnivores and do not seem to have very much competition for food because of their size and ability to hunt. Not all sharks now are at the top of the food chain but for the most part there are not many other creatures that will put up a good fight with a shark.
Just like an creature on earth as time goes on something’s are no longer needed and eventually with enough time that creature evolves and either changes something to better adapt to their surroundings or gets rid of something they do not need anymore. Just like the way humans do now no longer need appendixes because evolution is getting rid of something

Sharks are made up of mostly cartridge and this is something that over time it is hard to find fossils that have survived over the years because the cartridge deteriorates and is no useable. With many fossils found before sharks they are made of bone so it is a lot easier for people to discover what the creature was because of the intact fossil. Cartilage is good for the shark because it is lighter than bone so the shark is more mobile than say a fish that has real bones. Humans also have cartilage in places like the nose and the ear and this is why when looking at a human skeleton there is nothing in the place of where the nose was and why there is a hole where the ear is normally

Sharks have changed a ton from when they roamed the earth millions of years ago, from body shape, to the size of sharks. Sharks that used to exist have helped evolve modern sharks into something we can study on a daily basis. From the data I have presented in this research paper I feel I have learned a lot on what sharks used to be. I have gained knowledge on how sharks adapted to their every changing environments. Reading all these articles have shown me why sharks are they way they are to this day and that to me was the best part about this project, knowing that I will be able to use this information for the rest of my life. The topic of shark evolution may seem to be focused only on sharks but it is much more because what I learned from sharks I can use when I am looking at other species because they all have similarities of where they came from. Before this paper I had no idea when sharks were discovered and I really didn’t know much about the ancient species. Learning this has been very cool and has taught me lot more than just