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7 Cards in this Set

  • Front
  • Back
Define evolution
The gradual change of organisms over time.
What is natural selection?
Natural selection is Darwin's theory of evolution.
What is the first step of Darwin's theory?
The first step is that there is variation in every population between individuals, caused my the mutation of genes.
What is the second step of Darwin's theory?
The second step is that organisms compete for resources like food and shelter
What is the third step of Darwin's theory?
The third step is that if the environment changes, the organisms that are best adapted to the environment will survive and reproduce, and will pass on their genes.
What is the fourth step of Darwin's theory?
The fourth step of Darwin's theory is that organisms that are not well adapted will die so their genes are no passed on.
What is the fifth step of Darwin's theory?
The fifth step of Darwin's theory is that over time, the beneficial genes become more and more common in the population