Bolvin-L1BioCh15 Word Scramble
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| Question | Answer |
| evolution | gradual change in the characteristics of a species over time |
| natural selection | mechanism for evolution in which the best adapted to the environment survive to reproduce and pass on their well adapted genes |
| adaptation | any trait that helps an organism survive |
| structural adaptation | similar structures in completely unrelated species: ex. wings on a bird and a bee |
| homologous structure | similar body parts on somewhat related organisms like the forelimb bones on humans, bats, and whales |
| vestigal structure | body part with no apparent function in modern species that had a function in ancestoral species |
| artificial selection | man breeding animals and plants to get offspring with the desired traits |
| allelic frequency | how often a form of trait occurs in a population |
| genetic drift | a higher than normal allelic frequency in a population due to a chance mutation in a small population |
| stabilizing | type of natural selection that favors the average individuals |
| directional | type of natural selection that favors one extreme variation in a population |
| disruptive | type of natural selection that favors both extreme variations in a population |
| polyploid | individual that has multiple sets of chromosomes, common in plants |
| gradualism | rate of evolution in which speciation occurs very slowly and steadily over a long period of time |
| punctuated equilibrium | rate of evolution in which long periods of genetic stability are interrupted by a blast of rapid speciation and extinction |
| adaptative radiation | one species evolves into two species which each evolve into 2 species until there are many different species all with the original species as an ancestor |
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