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Evolution, We can describe evolution as the change in adaptive features…
Evolution
Evidence for evolution
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Embrionic development
Analysis of different embryos, such as fish, salamandras, chicken and human, reveals that early stage embryos are very similar
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Artificial selection
Process by which humans select certain individuals to cross to enhance certain characteristics that they are certain
Examples: cows that yield more milk, sweeter corn, different types of dogs
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Fossil record
It recreates the sequence of different organism and shows how organisms have changed as life developed on Earth
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Human evolution
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Homo sapiens closest living relatives are bonobo, chimpanzee, gorilla, orangutan and gibbon
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Diagram
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Two members of the Homo genus that were alive at the same time were the Homo neanderthanlensis and the Homo sapiens
Two hominids that have been alive at the same time 2 million years ago were the Parantropus robustus, Parantropus boisei and Homo habilis
Darwisnism
Suggested the existence of a common ancestor between the offspring, which had differences due to variation in the population
The changes that were beneficial remained through time because of the survival of the individuals that have that specific trait and their mating
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Natural selection
It suggests that the best adapted organisms are selected to pass on their characteristics to the next generation
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Struggle for existence
Competition because there is limited amount of resources and, as mentioned, there is overproduction of population, which leads to competition of survival
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Darwin
Made a trip in the HMS Beagle to observe nature, and he collected a lot of evidence. However, it took him many years to publish the information: On The Origin Of Species
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We can describe evolution as the change in adaptive features over time, as the result of natural selection
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Process of adaptation: the process resulting from natural selection, by which populations become more suited to their environment many generation
Nature selects the fittest, but it is actually a random process
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