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11 Cards in this Set
- Front
- Back
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Define Evolution |
The process in which inherited characteristics within a population change over generations such that new species sometimes arise |
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Artificial Selection |
is the process by which humans selectively breed organisms for desirable traits. |
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Natural selection |
When organisms with favorable combinations of traits survive and pass on their DNA to future generations |
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What type of data do we use to support evolution and common ancestry? |
Fossil record, Geographic distribution of living species, Homologous structures of living organisms, embryology |
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Reason for variation in the natural world |
Gene shuffling: crossing over and sexual reproduction results in a new combination of Genes. mutation: random change in the DNA sequence, lead to new Genes/traits, must be in the gametes to affect evolution. |
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Important of Fossils |
Important to scientists because they can be used to identify evolutionary trends in the morphology, anatomy, injuries, and diseases of organisms over time. |
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Comparative anatomy inportance |
Yields evidence that supports evolution of organisms from a common ancestor |
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Homologous structure |
Refers to the same anatomical features and structures and embryological development but have different functions |
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Analogous Stuctures |
Meaning similar anatomical features but differ in a species evolutionary history |
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How do vestigial structures demonstrate common ancestry? |
Vestigial structures can be traced back and the structures can be proved to be similar to other species, even though they are small and not used. |
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What comparison did you see between vertebrate embryos? |
All have a postanal tail, somites(body segments), and paired pharangealpouches (gill slits). |
