Vocab review
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| evolution | gradual change in the characteristics of a species over time
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| natural selection | mechanism for evolution in which the best adapted to the environment survive to reproduce and pass on their well adapted genes
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| adaptation | any trait that helps an organism survive
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| structural adaptation | similar structures in completely unrelated species: ex. wings on a bird and a bee
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| homologous structure | similar body parts on somewhat related organisms like the forelimb bones on humans, bats, and whales
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| vestigal structure | body part with no apparent function in modern species that had a function in ancestoral species
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| artificial selection | man breeding animals and plants to get offspring with the desired traits
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| allelic frequency | how often a form of trait occurs in a population
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| genetic drift | a higher than normal allelic frequency in a population due to a chance mutation in a small population
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| stabilizing | type of natural selection that favors the average individuals
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| directional | type of natural selection that favors one extreme variation in a population
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| disruptive | type of natural selection that favors both extreme variations in a population
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| polyploid | individual that has multiple sets of chromosomes, common in plants
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| gradualism | rate of evolution in which speciation occurs very slowly and steadily over a long period of time
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| punctuated equilibrium | rate of evolution in which long periods of genetic stability are interrupted by a blast of rapid speciation and extinction
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| 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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Created by:
abolvin
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