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26 Cards in this Set
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Evolution |
process by which population change over time |
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Population |
all individuals of a species that live together in one area |
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Species |
smallest unit in which evolution can be observed |
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Adaptation |
process by which populations change over time |
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Genetic Variation |
differences in genes within a population; why we all look different |
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Extinction |
the failure of a population to respond to changes in its environment; die off |
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Genetic Drift |
the genetic makeup of a population to be altered (changed) |
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Speciation |
formation (creation) of a new species |
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The number and location of bones of many fossil vertebrates are similar to those in living vertebrates. Most biologists would probably explain this fact on basis of a |
Common Ancestor |
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Process by which individuals that are better suited to their environment survives and reproduce most successfully (survival of the fittest) is known as |
Natural Selection |
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Charles Darwin |
Father of Evolution |
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Struggle for Existence |
members of each species compete to obtain food, living space, and other necessities of life |
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Preserved remains or impressions of ancient organisms that reveal changes in populations over time |
Fossils |
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Limbs (bones) in different species with the same structure, but different purpose/function (use) that are inherited from a common ancestor is |
Homologous Structures |
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Structures that have no purpose/function (use); Ex: appendix and wisdom teeth in humans |
Vestigial Organs |
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The study of the early stages of development |
Embryology |
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Evolutionary similarities can be seen between organisms by comparing their DNA |
Biochemical Similarities |
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The Evidences of Evolution: |
1. Fossil Record 2. Homologous Structures 3. Embryology 4. Vestigial Organs 5. Geographical Distribution 6. Biochemical Similarities |
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Oldest fossils are found: |
Bottom
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Youngest fossils are found: |
Top |
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Protective coloration helped the black moth survived when the trees turned black. This is an example of |
Natural Selection |
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Nature provides the variations amongst organisms and human's select (pick) the variations they find useful.
Ex: Farmer's breed the largest hogs for the most meat |
Artificial Selection |
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The white feathers of a snowy owl allow it to blend in with its environment during the winter months (snow). This is an example of |
Adaptation |
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A plant, human, mushroom, dog and cat all have what in common |
DNA |
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Genetic variation can aid in survival of species when the environment changes. What is the best example of an organism with the genetic variation that could improve survival chances over time. |
fleas that are resistant to inesecticide |
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The opossum and kangaroo are both marsupials that have pouches where they keep their babies. This provides evidence that these 2 animals descended (came from) a |
Common Ancestor |
