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Definition
| a group of individuals that belong to the same species live in a defined area, and breed with others in the group |
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Definition
| the processes by which populations change in response to their environment |
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Definition
| the changing of a species that results in its being better suited to its environment |
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Definition
| change that occurs within a species over time |
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Definition
| two populations of the same become seperated from one another |
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Definition
| a group of organisms that look alike and are capable of producing fetile offspring |
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Definition
| the organism disappears completely |
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Definition
| change that leads to a replacement of a species (for example- mammals replacing the dinosaurs) |
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Definition
| preserved or mineralized remains of an organism that lived long ago |
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Definition
| shows how organisms are related through evolution |
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Definition
| indicated by a branch point in a family tree |
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Definition
| structures that share a common ancestry |
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Definition
| structures are present in an organism but are reduced in organism's evolutionary past (tailbone) |
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Definition
| gradual change over a long period of time that leads to species formation |
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Definition
| periods of rapid change in species are seperated by periods of little or no change |
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Definition
| the darkening of populations of organisms over time in response to industrial pollution |
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Definition
| accumulation of differences between groups |
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Definition
| the process by which new species form |
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Definition
| the prevention of mating between formerly interbreeding groups or the inability of these groups to produce fertile offspring |
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Definition
| ancient bacteria which produced oxygen gas into the oceans |
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Definition
| there have been 5 major mass extinctions of life on Earth, the last one was 65 milltions years ago |
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Term
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Definition
| active during the day and sleep at night |
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Definition
| stands out at an angle from the other fingers and can be bent toward them to grasp an object |
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Definition
| belonging to the human line of ancestry |
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Definition
| able to walk upright on two legs |
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