Tetrapod

Tiktaalik shows us how even early tetrapods relate to humans. Tiktaalik is nearly perfectly for proving his theory about the transitions between organisms, in this case, fish and amphibians. It has a scales and fins with webbing, but the fins contain the standard limb structure of one bone, two bones, lots of bones, digits. It also has a flattened head and even the neck of a tetrapod. It has a limb structure that is just like humans, cats, rats, and everything…

One day, in 1960, a man named Tim Dinsdale drove to Loch Ness in Scotland and began to film something that would change reality. People should believe that the Loch Ness monster may exist in Loch Ness. The fact that the Loch Ness monster exists is supported by significant evidence that includes water-based sightings, land-based sightings, film/pictures, and sonar evidence. This monster is according to Dictionary.com “a large aquatic animal resembling a serpent or a plesiosaur like a reptile,…

The Evolving Planet exhibit at the Field Museum of Natural History is a work of art that thoroughly explains the story of life through evolution. The exhibit begins by informing us about organic compounds coming to be on earth and how all living organisms require organic compounds. It moves on to explain single cell organisms developing from organic compounds and then becoming self-sufficient using energy from the sun. These single-cell organisms grew into more complex beings with genetic…

out of the heart to the gills. The blood is oxygenated at the gills and sent throughout the body before returning to the heart deoxygenated. The flying fishes have six aortic arches that are responsible for bringing blood to and from the gills. In tetrapods, arches I, II, and V, are lost. Arch III becomes the carotid, arch IV, becomes the aorta, and arch VI becomes the pulmonary trunk. In mammals, such as the jerboa, the left side of the aortic arch is retained. The jerboa has a four chamber…

To start off the exhibit is the Precambrian period. The Precambrian period lasted for 4 billion years. Scientists believe that this period where 90%of earth's history was discovered. Life first started evolving, and progresses and changed the planet. Scientists discovered the truth about organic compounds, the first prokaryotic cells and the first meteorites to hit the earth. Scientists believe that some of these meteorites gave rise to organic compounds, or life's building blocks. The Cambrian…

All species are believed to have come from a common descent. Therefore, humans are thought to have evolved from an ancestral species that can be directly related to all forms of life. Evidence of a common ancestor is even evident among fish and humans. For instance, modern day animals have vertebrae, being composed of a bony skull and backbone. The first organisms on earth to have a bone-like structure are fish. The similarities between the bones of fish and humans can be illustrated through…

light of evolutionary changes. For example, the transitional fossil can provide how the ancestor and modern species are different and similar. The most known example of transitional fossil is Tiktaalik which is the species between the arthropod and tetrapod. In addition, we can trace back the ancestor of the modern species using fossils. In the article, Perkins details how the species named elder frog might be an ancestor of salamander and frog, which fundamentally means that salamander and frog…

the origin of certain species.22 There are a few types of comparative anatomy. Homologous comparative anatomy is when there are the same structural traits shared between species but these structures do not perform the same function.22 For example, tetrapods originated from ancient aquatic finned animals with carpels and metacarpals.22 On the other hand, analogous comparative anatomy is when certain species perform the same function but the structures that enable that function are not the same.22…

development: so in other words, your great-great-great (multiply by a billion) grandmother was a small, humble fish of the Devonian age. The fossil history of amphibians provide evidence of the first tetrapods: now-extinct amphibian species going back nearly 400 million years. Evolution of tetrapods from fishes represented a significant change in body plan from one suited to organisms that respired and swam in water, to organisms that breathed air and moved onto land. These…

Natural selection is when stronger organisms adapt to their environment and have more children. First is variation- different, then selection when the most favourable survive and breed more. Inheritance when offspring get favourable traits. Time- Evolutionary change- few gen Speciation- thousands of years The likeness and the variation in comparative anatomy is different in the anatomy of species. A noteworthy issue in deciding evolutionary connections in view of near life structures…