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29 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Radioactive dating |
A technique used to date fossils by looking at radioactive minerals |
Technique .........radioactive minerals |
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Relative dating |
Fossils are dated based on their position in the rock layer same to another fossil |
Position........rock layer.......another fossil |
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Precambrian Era
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Everything that happened before roughly 544 million years ago |
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Paleozoic Era |
Marine Life dominated |
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In what era did the Cambrian explosion occur? |
Paleozoic Era |
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In what era did RaPid diversification start? |
Paleozoic Era |
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What happened in the Cenozoic Era? |
Mammals evolved adaptations that allowed them to live in varied environments |
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Miller and Urey's Experiment tried...... |
To stimulate early earth atmosphere
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Endosymbiosis |
Are incomplete phagocytosis |
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How do fossils help scientists |
They help scientists to know that species change overtime |
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Embryos |
Closely related species develop in similar ways while they are embryos |
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Jean Baptiste Lamarck |
Proposed a theory that individuals change out of need of certain aspects These changes in individuals can be passed on to their offsprings |
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Fish |
Precambrian Era |
544mya |
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AmPhibians |
Paleozoic Era |
544mya-245mya |
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Birds |
MeSozoic Era |
245mya-65mya |
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Mammals |
Cenozoic Era |
65mya-today |
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Fossils |
Any evidence of organisms that lived long ago |
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Homologous structures |
Are similar structures that are found in related organisms but have different functions |
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Charles Darwin (1809-82) |
Sailed around the world on the HMS Beagle including the Galapagos Islands
Formulated the theory of evolution |
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Artificial selection |
Humans choose which individual can reproduce This supports the idea that species can change overtime |
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Biochemical similarities |
All organisms use the same basic chemicals |
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Gene pool |
All the alleles within a population of particular species |
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Species |
Community of animals that can produce offsprings that can also produce |
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Adaptive radiation |
Where one ancestral species gives raise to many species |
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Convergent evolution |
When non-related species develop similar traits on their own as a result of living in a similar environment |
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Directional selection |
One extreme is selected for while the other is selected against |
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Stabilizing selection |
Both extreme are selected against and the average is selected for |
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Disruptive selection |
Both extremes are selected against |
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Alleles |
Different form of gene |
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