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18 Cards in this Set
- Front
- Back
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Geological Time Scale
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Divides history into a series of era defend by a major geological biological event
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Fossils
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Reveal time periods of organisms existence
Remnants of traces of organisms that lived in the past -each is a combo of ancestral & new traits -all appear to be related |
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Relative Dating
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Places fossils between events w/out specific age
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Absolute Dating
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Determine the actual age of a material
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Radiometric Dating
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Methods measure the time elapsed since the particular radiometric clock was reset.
Ex. ½ life: oldest rock is in Australia & is 4,404 billion yrs. old |
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Plate Tectonics-Evidence
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Earth’s surface consists of several rigid layers
Layers move causing land masses to move |
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Evidence
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Pangaea
Iron rich molten w/ magnetic orientation Deep Sea probes show the seafloor is moving |
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Pangea
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Model of continents-fit together based on fossil distribution & existing species
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Biogeography
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The study of the distribution pattern of species across the planet
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Comparative Morphology
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Study of similarities & differences of structures & body parts among groups of organisms
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Vestigal Structures
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Structure w/ no apparent function
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Homologous Structures
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Similarities in one or more body part between groups
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Morphological Divergence
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Changes in body form a common ancestor
Ex. Stem reptiles- relatives of land verts |
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Analogous Structures
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Dissimilar body parts have become similar in structure, function or both in lineages that are not closely relative
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Morphological Convergence
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Individual of different lineages evolve in similar ways under similar environmental pressure
Produces analogous structures that serve similar functions Homologous= Divergence Analogous= Convergence |
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Comparative Development
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find
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Comparative Biochemistry
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find
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Individual of different lineages evolve in similar ways under similar environmental pressure
Produces analogous structures that serve similar functions Homologous= Analogous= |
Divergence
Convergence |
