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Short essay introduction to evolution
Introduction of evolution
Introduction of evolution
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Evolution is the theory that over time a species will slowly develop new characteristics and eventually become an entirely new species. Based off of fossils that have been found, studied, and tested, scientists have been able to create what they call a fossil record. In the fossil record there is evidence of minor changes in creatures and those changes taking millions of years, overtime these changes amounted to a point where the creatures were completely different, this proves that evolution is true. The changes started with a creature called a chordate which was essentially a very primitive fish. Over time some of these fish located to shallow areas of water, to adapt to the shallow water the fish developed very primitive versions of arms, …show more content…
Early mammals were different from early reptiles in that they had developed a bigger brain and they used keratin not only for claws but also hair. Eventually certain mammals developed into early primates and developed the ability to climb branches. One defining characteristic of early primates that set them apart from just about every other creature is their eyes eventually moved from the sides of the face to being in the front of the face, this development was another key point in evolution. Eventually primates split into two groups, the first one being old world monkeys and the other being Great Apes which are also called Hominidae. Some key characteristics of great apes that set them apart from old world monkeys is that they lost their tails, began to walk on two feet, and gained flexible wrists. The development of flexible wrists and becoming bipedal was another key point in evolution, this is because being bipedal allowed for greater movement and flexible wrists allowed weapons and tools to be used once they were
: Primates didn’t just appear among Earth, but they evolved. The coevolution has to do with flowers and fruits. Fruits were evolving to get tastier for primates to eat and as primates ate them they spread them around as well. As they ate these new evolved fruits and flowers this invited changes onto their bodies as
Evolution is deemed as being scientific because it is testable and correctable, unlike creationism which deals with “God’s will,” an unchanging and set in stone philosophy that contradicts any scientific notion it attempts to deliver. Evolution is the scientific explanation to how organisms developed the forms and functions
Primates, any placental mammal of the order Primates, normally having flexible hands and feet and, in the higher apes, a highly developed brain (“Primate”, 2016), have been one of the most popular animals and prominent attractions in zoos.
Our earliest ancestors are primates. They are our closest relatives which is why we can see our behavior’s and practices in them. If we observe them we can get a better understanding of them and us, human beings. But unfortunately we all don’t get the chance to see a Primate right in our backdoor. So the best thing I could do for my observation was to visit them at the zoo.
What is evolution? Evolution in modern terms is fairly easy to understand. Evolution is the theory that life on earth began with a single celled organism that lived more that 3.5 billion years ago that slowly evolved into many diverse creatures over time. When you break down this theory into sections you get 6 factors: evolution, gradualism, speciation, common ancestry, natural selection and nonselective mechanisms of evolutionary change.
Apes, like humans, are catarrhines and part of the superfamily hominoidea. Apes started to appear in the Miocene about 20 million years ago(lecture notes, week 10), under this category there are many primates that are distinguished as apes, such as, orangutans, gibbons, chimpanzees, and gorillas. These particular primates are from the old world and are native to Africa and Asia. Apes can be distinguished by the foramen magnum towards the back of the skull, having no tail, and having a hook nose (Larsen 2013, p. 150). Another characteristic of apes is that they have large brains for their body size, this is important because it shows they have a higher intelligence than other animals, and this can be connected to the relationship shared with humans.
What is evolution? Evolution is the process at which all living things that are around use today that have ancient ancestors in their background. Also, with evolution it allows for use to see how we have similarities as well as differences from all living organisms from the past to the present. By being able to see the similarities as well as differences it shows how overtime we have changed and evolved through the use of evolution. However, the use of evolution involves different mechanisms in order for it to take place.
Evolution is a process of living things change slowly in a very long time, so it evolved into a new species more complete body structure. According to the theory of evolution, living now in contrast to living in the past. The ancestors of creatures alive today may experience changes in form and structure. In addition, may experience changes in both the structure and genetics in a very long time, so the shape was totally different from the original and finally generate different types of species present. So the plants and animals living there now was not the first time here on earth, but it comes from living in the past.
The first group of primates was the Ardipithecus group. They were the earliest humans closely related to other primates. The Ardipithecus group evolved in Africa and took the first step upright on two feet. Sahelanthropus tchadensis was the first human species to ever walk the earth. They were the building block of more complex species to come. There were many species that started the human race such as the Orrorin tugenensis. This species was nicknamed the Millenium Man and live 5.8-6.2 million years a...
The thought of evolution is filled with theories, ideas and beliefs. The definition of evolution is rather simple. According to Jerry A. Coyle, evolution is “the change in the inherited characteristics of biological populations over successive generations (2). Evolution gives rise to diversity when it comes to the hierarchy of life otherwise known as biological organization. Many people find the topic of evolution to be troubling and very confusing. Throughout history churches have preached that evolution is atheistic and a sin if even thought about. Famous scientist, Charles Darwin, is said to really be the first to formulate debated theory of evolution by the means of natural selection. Eventually in the 20th century genetics was compounded with Charles Darwin’s theories of evolution. Even today scientists continue to study different aspects of the theory of evolution.
Senescence, usually defined as progressive loss of fertility and increasing probability of death with increasing age (Kirkwood and Austad 233), is clearly a process detrimental to an individual – and, at first glance, hard to reconcile with the process of natural selection ,which would work towards ensuring optimal survival and increasing fitness (reproductive success). It seems, at a cursory glance, that it would also work towards preventing the aging process because aging leads to increased mortality rates and decreased reproductive capability.
What is evolution and how does it work? Evolution is the theory of how one form of life changes into another form. Evolution also is the change in a population’s inherited traits from generation to generation. Evolution helps to explain why an animal, human, and plant looks the way it does and acts the way it does; it gives an explanation of the history of life. Genes come in many varieties, and the evolution helps to make it happen.
Evolution is a systematic mechanism through which the modern day has evolved from his ancestors. The Darwin’s Theory of Evolution is based on the premise that we all
The increase in brain size may be related to changes in hominine behavior (See figure 3). The third major trend in hominine development is the gradual decrease in the size of the face and teeth. According to the Microsoft Encarta Encyclopedia ’98, the fossil evidence for direct ancestors of modern humans is divided into the category Australopithecus and Homo, and begins about 5 million years ago (See figure 1). Between 7 and 20 million years ago, primitive apelike animals were widely distributed on the African and, later, on the Eurasian continents (See figure 2). Although many fossil bones and teeth have been found, the way of life of these creatures, and their evolutionary relationships to the living apes and humans, remain matters of active discussion among scientists.
Without evolution, and the constant ever changing environment, the complexity of living organisms would not be as it is. Evolution is defined as a process that results in heritable changes in a population spread over many generations (8).Scientists believe in the theory of evolution. This belief is based on scientific evidence that corroborates the theory of evolution. In Figure 1 the pictures of the skulls depict the sequence of the evolution of Homo-sapiens. As the figure shows, man has evolved from our common ancestor that is shared by homo-sapiens. The change of diet of homo-sapiens over time has thought to contribute to the change in jaw structure and overall skull shape.