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Chapter 7 Review

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Across
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When a population is not evolving it is in ....
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Type of selection where either extreme is favoured
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Changes in the regulation of gene expression that can be passed on to offspring
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Can be formed from bones, feathers, scales or shells
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Something that causes the loss of a portion of a population, such as predators
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Large-scale changes that give rise to a new species
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Type of selection where humans determine which organisms will reproduce
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Researcher who believed traits are acquired through behaviours
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The study of how organisms live in their environment
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The process of changing the regulation of gene expression
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Where genetic changes have to occur for evolution to occur
Down
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Type of reproduction that increases genetic variation
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These organisms have existed on earth for 3.5 billion years
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Type of selection where one extreme is favoured
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Researcher that came up with "survival of the fittest"
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When antibiotics don't kill bacteria
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Small changes in a population over time
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Rate of evolution that occurs very slowly over time
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Can be used to determine how closely related different species are
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Type of selection where the intermediate phenotype is favoured
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The reason for all new alleles
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Type of reproduction where offspring are genetically identical to the parent