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| the idea that a species changes over time. |
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| is a similarity that exists in species descended from a common ancestor. |
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| is similarity in the DNA sequences of different species. |
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| refers to similarities in adult morphologies |
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Definition
1. Individuals that make up a population vary in the traits they possess.
2.Some of these trait differences are heritable.
Each generation, many more offspring are produced than can possibly survive. Only some individuals in the population survive long enough to produce offspring. Of these, some will produce more offspring than others.
3.The subset of individuals that survive best and produce the most offspring is not a random sample of the population. Individuals with certain heritable traits are more likely to survive and reproduce.
4. Natural selection occurs when individuals with certain characteristics produce more offspring than do individuals without those characteristics. |
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| is the ability of an individual to produce offspring, relative to that ability in other individuals in the population. |
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| is a heritable trait that increases an individual’s fitness in a particular environment relative to individuals lacking that trait. |
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