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17 Cards in this Set
- Front
- Back
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What is Evolution
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the process in which by modern organisms have descending from ancient organisms
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What is Fitness
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the combination of physical traits and behaviors that help an organism survive and reproduce in its environment.
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What is Common descent
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idea that species have descended from common ancestors
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What is Adaptation
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the combination of physical traits and behaviors that help an organism survive and reproduce in its environment.
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What is Fossil
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the preserved remains or evidence of an ancient organism, fossils are bones from organisms that have survived for a long time and the people study them.
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What is a Geological time scale
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record of the history of life determined my the positions of layers of rock
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What is Relative dating
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a test to determine the age of fossils by comparing other fossils in different layers of rock
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What is Radioactive element
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unstable elements that decays into a stable element at a steady rate
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What is a Half-life
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length of time for halt of the radioactive atoms in a sample to decay
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What is Absolute dating
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the method of measuring rates of decay of radioactive material to determine how long ago an event occurred or how long ago the organism lived
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What is Era
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largest interval of time in a geological time scale
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What is Period
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interval in a geological time scale that is composed of epochs
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What is Sedimentary rock
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are formed when exposed to rain, heat, and cold breaks down existing rocks into small particles of sand, slit, and clay.
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What is a Paleontologists
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scientists who study fossils
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What is a Fossil record
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collection of fossils that represents the preserved collective of the earth’s organisms
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What is Homologous structure
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parts of different organisms, often quite dissimilar, that develop from the same ancestral body parts
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What is an Vestigial organ
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an organ that some animals have that serve little to no purpose in the body.
ex. Appendix |
