Origin of Evolution

Roberta De Leon

Growth in Numbers

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In order for a population to grow it must develop certain factors that will help it endure and survive, and many of the factors that it evolves regarding its genetic are become of the need to grow in numbers. Those with the most potential to help increase the population will pass on their genes, with the hope of making a "bigger family." Population growth is necessary for a species, because the decline of growth could lead to extinction, and so animals evolve with the hopes of survival. For example, the pink salmon that migrates to Alaska every year, but now it is migrating 2 weeks earlier than it used to due to global warming. The water get hot faster, and the fish who migrate late don't get to breed, so the smarter fish migrate earlier and pass of their genes.


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Resources in any ecosystem are limited, which serves as a population control factor and prevents overpopulation in most species in the world, but this means that animals must compete with each other in order to survive. Biologists typically recognize two types of competition: interference and exploitative competition. During interference competition, organisms interact directly by fighting for scarce resources. For example, large aphids (insects) defend feeding sites on cottonwood leaves by kicking and shoving smaller aphids from better sites. In contrast, during exploitative competition, organisms interact indirectly by consuming scarce resources. For example, plants consume nitrogen by absorbing it into their roots, making nitrogen unavailable to nearby plants. Plants that produce many roots typically reduce soil nitrogen to very low levels, eventually killing neighboring plants.

Genetic Variation

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Each organism carries different traits, of which many are heritable. The genetic patterns of organisms change in order to adapt to the environment a species is found. Once the organism has adapted to the changes of environment in order to have biggest chances of survival, he will pass on those effective genes to his offspring. The offspring produced by a species carries heritable genes that vary due to mutation and sexual reproduction. The more variation there is the less probability of disease, and the more chance for survival. For example, there are many different type of jerboa, some with long ears and other withs very short ears. The Long-eared jerboa is a night creature, and it relies greatly on its hearing to stay alert from predators, so it has developed bigger ears.

Natural Selection

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According to Darwin's line of evidence, ''Organisms that have the best variations survive and produce (natural selection).'' The organisms that have the most helpful genetics will be the organisms that will live on, not necessarily the strongest organisms. These are the organisms that will be able to produce offsprings and pass on the characteristics to survive to others. There heritable traits will be passed on by generations. Because those with the appropriate genetics to survive live longer and produce more, the good genetics start to become more prominent. They are selected by the forces of nature: natural selection. For example, in an ecosystem, some giraffes have long necks and others have short ones. If something caused low-lying shrubs to die out, the giraffes with short necks would not get enough food. After a few generations, all the giraffes would have long necks.


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Harun Yahya. (2016). The True Origin of Species. M.harunyahya.com. Retrieved 7 April 2016, from http://m.harunyahya.com/tr/works/592/Darwinism-Refuted/chapter/40/The-True-Origin-of-Species

Phillip, M. (1997). “Evolutionary Genetics”. Population and Evolutionary Genetics. North Dakota State University. Retrieved April 7, 2016 from https://www.ndsu.edu/pubweb/~mcclean/plsc431/popgen/popgen4.htm

Steele, L. (n.d.). The Darwinian Concept of Natural Selection as Supported by the Microevolution of Biston betularia. Retrieved April 07, 2016, fromhttp://www.public.coe.edu/wac/darwin.htm

Thompson, H. (2014). Ten Species That Are Evolving Due to the Changing Climat. Retrieved April 7, 2016 from http://www.smithsonianmag.com/science-nature/ten-species-are-evolving-due-changing-climate-180953133/?no-ist