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15-3

Evolution

QuestionAnswer
What is a species? group of organisms that can reproduce naturally.
What is artificial selection nature provided the variation and humans selected the variations.
What is meant by "struggle for existence" members of each species compete to obtain food, living space, and other necessities of life.
How did Darwin use the term "fitness" result of adaptations.
What is an adaptation to evolutionists? any inherited characteristic that increases an organism's chance of survival.
What is meant by survival of the fittest ability of an individual to survive and reproduce in its specific environment.
What is natural selection changes in the inherited characteristics of a population.
How does descent with modification work passing of traits from a parent to its offspring.
What is common descent as used in this chapter all species living and extinct all share a common ancestor
What is a homologous structure structures that have different mature forms but develop from the same embryonic tissues
What is a vestigial organ organs in a body which are no more functional the way they were in their ancestral form of the trait.
Created by: KateynWink
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