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Top 3: NS & COT

Topic 3: Natural Selection & Change Over Time

TermDefinition
species a group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce
variation any difference between individuals of the same species
evolution change over time; the process by which modern organisms have descended from ancient organisms
fossil the preserved remains or traces of an organism that lived in the past
adaptation an inherited behavior or physical characteristic that helps an organism survive and reproduce in its environment
scientific theory a well-tested explanation for a wide range of observations or experimental results
mechanism the natural process by which something takes place
natural selection the process by which organisms that are best adapted to their environment are most likely to survive and reproduce
competition the struggle between organisms to survive as they attempt to use the same limited resources in the same place at the same time
fitness how well an organism can survive and reproduce in its enviroment
sexual selection a type of natural selection that acts on an organism's ability to get the best possible mate
coevolution the process by which two species evolve in response to change in each other time
fossil record all the fossils that have been discovered and what scientists have learned from them
epigenetics the study of small changes to DNA that turn genes on or off but do not change the genetic code itself
homologous structures structures that are similar in different species and that have been inherited from a common ancestor
extinct term used to refer to a group of related organisms that has died out and has no living members
protein large organic molecule made of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur
endosymbiosis a relationship in which one organism lives inside another organism's cells
Created by: muellershauna
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