Convergent Evolution: The Body Structure Of A Shark

Animals fight for survival daily, and sometimes their lives depend on their ability to adapt with their surrounding environments. Natural Selection is the process in which individuals have certain traits that allow

Biological evolution itself is the change in characteristics of living organisms over generations. Evolutionary theories suggest that all organisms alive today share a common ancestor. As unlikely as it sounds, evidence has been discovered proving this theory (relations from a spider to a monkey).

Evolution: the process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.

Evolution: A heritable change in the characteristics within a population from one generation to the next; the development of new types of organisms from preexisting types of organisms over

“The main lesson of biogeography is that only evolution can explain the diversity of life on continents and islands.” (Coyne 109).In convergent evolution 3 of the six components discussed in chapter 1 are working together. These 3 components are common ancestry, speciation, and natural selection. If evolution did exist, ancestors of species today that lived in the same place, when dug up, should be fossils that resemble organisms today.

7. Find two examples of convergent evolution among the Caminalcules. This means finding cases where two or more species have a similar characteristic that evolved independently in each lineage. The wings of bats, birds and bees is an example of convergence since the three groups did not inherit the characteristic from their common ancestor. Write your answers in complete sentences (e.g. “Species x and y both have ____ but their most recent common ancestor, z, did not”).

According to our text species of living things are related in some fashion similar to a branching tree. However the process is not quite that simple adaption relies on several processes and to prove this or the

The word evolution means the process of change over a period of time. For example: plants and animals evolve over time by their genetic system allowing them to adapt to different changes in the world. The theory of evolution states animals, insects, plants, humans, and etc are all from a one-celled ancestor. A bad example of evolution is having a bad diet, which does not pass on to your next generation.

Great white sharks live in almost all coastal and offshore waters which have water temperature between 12 and 24 °C (54 and 75 °F).Great white shark off Guadalupe Island, Mexico.The Great White Shark can be found in water as three feet deep, and as deep as 1280 metres.

The basis of our understanding of how species evolve and change over time is according to the theories of Charles Darwin and Alfred Wallace. They both observed similar arrangements and patterns in organisms but both individually came to a conclusion understanding natural selection through different ideas and techniques. Between the many ideas of Darwin and Wallace there are many similarities along with differences. Throughout these summaries, major points will be emphasized and described to assure further understanding of the topic which is natural selection.

Did you know that sharks appeared in the fossil record about 450 million years ago (Natural History Museum, N.D.)? Since we know that sharks have existed for 450 million years we know that they have had to survive many mass extinctions. In these mass extinctions many of the predators that preyed on sharks were killed off. These mass extinctions that the sharks were able to survive gave them the perfect opportunity to rise up in the food chain. The most well-known shark of our time, the great white shark, is said to have appeared about 11 million years ago (Shark Savers, N.D.).

“The process of evolution can be very slow, and allows living creatures to develop an anatomy that is structured for them to thrive” (Dolphin Evolution). Evolution is the gradual development of a creature, especially from a simple to a more complex organism. Many mammals have evolved from one animal to another. For instance, dolphins has evolved from land animals to ocean animals. All of the dolphins belong to the cetacean family, which also include whales, dolphins and porpoises. Dolphins are now aquatic mammals who are very intelligent and curious. However, what forces made them evolve? And what did Darwin mean by “survive by the fittest”? Or what principles of evolution or survival are at work? (Samantha & Paula)

By comparing the DNA of each species, scientist can name which species evolved by convergence. Convergent evolution occurs when there is two unrelated ancient or parental species can evolve to look more and more alike. Two species may strongly resemble each other but they are completely unrelated to one another – just like Losos found in his observation. A casual observer may assume that two organisms that look alike are in the same species but they’re actually not related at all. Take fish and dolphins as another example; they look similar but they are very different species. They both have fins and a tail, however, dolphins are mammals. Since these two species are subjected to the same environmental niches, fish and dolphins independently evolved having similar morphology since it is the most effective and efficient way of moving through the water (Convergent evolution). The traits that they developed arose on their own, favored by natural selection

An example of an ecological condition that might cause a lineage to cause very little over time is the species being in a stable environment that is very comfortable to them. If an organism can reproduce, find shelter, avoid predators, and feed itself with little to no difficulty, there is no need for it to adapt or evolve.

Evolution refers to change over time as species modifies and separate to produce several offspring species.