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15 Cards in this Set
- Front
- Back
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define adaptation |
an evloutionary modification that improves the chances of survival and reproductive success in a given environment |
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what are homoplastic feature (homoplasy)? |
similarity in the characters in different species that is due to convergent evoltuion, not common descent. characters that exhibit such similarity are called homoplastic features or homoplastic traits |
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what does natural selection allow a popultation to do? |
adapt to the environment, more likely to survive and become the parents of the next generation; the frequency of favorable traits increases over time whereas less favorable traits become scarce or disappear |
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name two geological activities taht are common in areas where tectonic plates meet |
earthquakes adn volcanos |
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name the steps of darwin's concept of natural selection |
1. variation 2. overproduction 3. limits on population growth / struggle for existence 4. differential reproductive success |
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evoltuin is genetic change in a (an) _____that occurs over time. |
population |
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the islands where charles darwin observed variation among organisms and compared tehm to those organisms found onhte mainland were the: |
Galapagos |
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bird wings and insect wings are both adapted for flight but they are from two very separate ancestors; this is known as ______structures |
Convergent evolution / homoplasy |
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organs or parts of organs that are seemingly nonfunctional and degenerate, often undersized or lacking some essential part, are referred to as: |
vestigial structures |
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_________is the evolutionary history of a gorpu of related species |
phylogeny |
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who proposed that hte earth's geological features formed slowley over time, creating long periods for evoltuion? |
charles lyell |
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_________penned an essay stating that population have the capability to out grow their food supply resulting in disease, famine and competition. |
thomas malthus |
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breds of dogs, such as german shepards occur as a result of : |
artificial selection |
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when population with separate ancestors adapt in similar ways to similar environmental constraints, it is referred to as: |
convergent evoltion |
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the genetic code demonstrates the universality of living things because it is common to virtually all ___________________. |
organisms |
