In referring to evolution, the word means various changes. Evolution refers to the fabrication and development of life on earth. "Organic evolution" is the concept that all living beings evolved from simple organisms and have changed throughout the periods of time to create many and various types of species. Organic evolution is better known as the "theory of evolution." There are three main theories of evolution, which are, the early theories proposed by Comte de Buffon, Baron Cuvier, and Lamarck, the synthetic theory, and the Darwin theory.

In the 1700s, French naturalists, Comte de Buffon and Baron Cuvier concluded with the studies of fossils and comparative anatomy that life on earth had endured many changes through a long period of time. In the early 1800s, another French naturalist named Lamark, proposed the first complete theory of evolution. He observed through is observations,

e possessed the control over the environment and created cites and established civilizations.

"The cradle of mankind...," as Darwin said,"...was Africa." Darwin also stated ," In each great region of the world, the living mammals are closely related to the evolved species of the same region. It is, therefore, probable that Africa was formerly inhabited by extinct apes closely allied to the gorilla and chimpanzee: and as these two species are now man's nearest allies, it is somewhat more probable that our early progenitors lived on the African continent than elsewhere."

ion gets rid of complex characteristics, which in turn, decreases the amount of variation in a population. The most common form of natural selection can most likely be stabilizing selection. Species who favor mates who display certain types of behavior or have certain physical features tend to fall under the category of sexual selection. Complicated sex rituals can be created through sexual selection. For example, bright coloring can attract a mate. Another example, is that many males of different species of birds have more variety of colors in their feathers than females. Genetic drift represents the random change of genes in populations. Genetic drift is enabled by the random way that egg and sperm cells receive some chromosomes from each parent. The circumstance that reproductive cells consist of only half a set of chromosomes as the parent cell, leads to the conclusion that only half of a parent's genes are present in an egg or sperm. As a result, some of the parent genes !

British economist Thomas Robert Malthus aided Darwin in creating the theory of natural selection. Malthus proposed how human populations remain in balance. He debated that any increase in the availability of food for basic human survival could not equal the geometrical rate of population growth. In addition, limitations such as famine, disease, or war, play a major role in deciding the population growth. With this proposal, Darwin quickly applied Malthus's proposal in circumstances of plants and animals. In 1838, Darwin designed a projection of a theory of evolution through natural selection.

The distinct qualities and features of the Homo sapiens have appalled anthropologists. Examples of these special qualities and features of the Homo sapiens, which have appalled anthropologists, are features such as language, high technological skills, and the ability to make ethical judgements. Despite these qualities, the most significant and most recent quality, is the Homo sapiens connection with the African apes is practically the same.

propose his theory of evolution. On the coast of South America, Darwin came under the possession of many specimens of plants and animals. On the Galapagos Islands, off the coast of Ecuador Darwin discovered many differences between species on the islands and with the species on the mainland. For example, Darwin noted that certain fossils of extinct species were closely similar to living species in the same geographical area. Darwin also observed that each island possessed its own form of tortoise, mockingbird, and finch. He also discovered various forms of these species were closely similar but differed in structure and eating habits from island to island. In addition, Darwin discovered varieties of differences between species on one island and another island. With each observation, Darwin come to the question of possible links between distinct but similar species.

will not be replicated and passed on to its offspring. In addition, genetic drift does not allow species to evolve to accommodate to their environment. The cause of this incapability occurs because genetic drift causes random changes in the cycle of characteristics. Over a long period of time, genetic drift is able to gradually alter the genetic features of a population.

The first human species is believed to have evolved only about 7 illion years ago. Data indicated that the blood pro

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