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22 Cards in this Set
- Front
- Back
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Species
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A group of organisms that share similar characteristics and can reproduce among themselves to produce fertile offspring
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Evolution
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Change in inherited characteristics over time
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Babtiste de Lamarck
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Characteristics or traits developed during a parent organism's lifetime are inherited by its offspring
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Natural Selection
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Organisms with traits best suited to their environment are more likely to survive and reporduce
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Variation
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Inherited trait that makes an individual different from other members of its species
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Adaptation
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Any variation that makes an organism better suited to its environment
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Geographic Isolation
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Variations that do not exist in the larger population might begin to be more common in isolated population. They become two very different populations.
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Gradualism
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Slow, ongoing process by which one species changes to a new species
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Punctuated Equilibrium
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Rapid Evolution comes about when the mutation of a few genes results in the appearance of a new species over a relatively short period of time
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Most fossils are found in __________ rock.
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Sedimentary
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Sedimentary Rock
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Formed when layers of sand, silt, clay, or mud are compacted and cemented together
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Relative Dating
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Provides an estimate of a fossil's age. Compares ages of rock layers found above and below the fossil layer
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Radioactive Element
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gives off a steady amount of radiation as it slowly changes to a nonradioactive element
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Radioactive Dating
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Estimate the age of a fossil by comparing the amount of radioactive element with the amount of nonradioactive element in the fossil
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Embryology
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The study of embryos and their development
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Homologous Structures
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Body parts that are similar in origin and structure
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Porpoise flipper, Frog forelimb, Human arm, and bat wing are examples of ___________ structures
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Homologous
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Vestigial Structures
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Structures that don't seem to have a function
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The human appendix is an example of a ___________ structure.
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Vestigial
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Primates
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Humans, monkeys, and apes belong to this group
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Hominids
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Humanlike primates that are different from the other primates
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Homo Sapiens
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Early humans that evolved from Cro-Magnons
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