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__________ hypothesized that characteristics developed by parents are passed on to their offspring.
A trip to the Galápagos Islands prompted ________ to develop the theory of evolution by natural selection.
Variations result from ________ in an organism's genes.
Geographic isolation (does / does not) contribute to evolution.
The rapid development of bacteria resistant to penicillin is an example of ________ ________.
Traits developed during a parent's lifetime (are / are not) passed on to offspring.
Darwin's theory of evolution by natural selection emphasizes the ________ among individuals of a species.
A species is a group of organisms that share similar characteristics and (cannot / can ) reproduce among themselves to produce fertile offspring.
Darwin observed that the beak-shapes of different species of Galápagos finches (were / were not) related to their eating habits.
________ are made up of all the individuals of a species living in the same area.
Variations that occur among individuals of a species (are / are not) passed on to offspring.
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