Chapter 13 Mastering Bio – Flashcards
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In natural selection, _____ determine which phenotypes are successful.
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current conditions in the local environment; Natural selection occurs through an interaction between the environment and the variability inherent among individual organisms making up a population.
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The ultimate source of all new alleles is
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mutation.
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The smallest unit that can evolve is a _____.
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Populations; populations evolve as individuals with different genotypes live and die, causing changes in the gene pool..
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A population is
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a group of individuals of the same species that live in the same area and interbreed.
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Which person has the highest evolutionary fitness?
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a man who lives to be 68 and has 7 children and 15 grandchildren; Production of fertile offspring is the key to evolutionary fitness.
