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What are the four steps of natural selection?

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Quick Answer

The four steps or conditions necessary for natural selection to occur are that more organisms are born than can survive, characteristics vary within a species, variations are inherited, and differences in reproduction and survival are due to variations. All four of these conditions must occur for natural selection to happen.

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Full Answer

The basic mechanisms of evolution include natural selection, genetic drift and mutation. Natural selection is a process in which the population of organisms that have adapted to their environment increases more than the population of less well-adapted forms. This concept was first explained in Charles Darwin's theory of evolution. Natural selection is sometimes referred to as "survival of the fittest."

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  • Q:

    How does natural selection lead to evolution?

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    Natural selection leads to evolution because the traits of those who are able to reproduce influence future generations genetics and gradually lead to these passed on traits becoming the normal state of being, thus causing the species in question to evolve. If a group of people have predominantly brown hair genes and have children, then by way of natural selection the dominant gene will increase with future generations, meaning that slowly in time this group of people will evolve to have mostly brown hair genes.

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  • Q:

    How does adaptation occur?

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    Adaptation is a genetically encoded product of natural selection that enables a species to develop a functional feature that helps to ensure its survival. As a species' environment changes in time, natural selection works with a population's genetic variability to produce offspring with differing characteristics. Those offspring possessing the characteristics best suited for survival are the ones that will go on to produce similar offspring, while those less-suited to survival eventually die off.

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  • Q:

    What are the four steps to art criticism?

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    The four steps to art criticism are: to describe what you see, analyze the elements the artist has used, interpret what the artist is trying to say, and evaluate its importance. This kind of analysis is done in an organised approach.

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  • Q:

    What are the four steps for solving an equation?

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    The four steps for solving an equation include the combination of like terms, the isolation of terms containing variables, the isolation of the variable and the substitution of the answer into the original equation to check the answer. The combination of like terms can also be referred to as simplifying. While this is not necessary as a first step, it is much easier to solve an equation when the terms are as simple as possible.

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