Giraffes with short necks lived in arid regions and fed on grasses. Over time, grasses disappeared, forcing giraffes to eat from trees. Mutations in the genome led to some giraffes inheriting the trait for long necks. Over time, there were more giraffes with long necks in the region. What are the two reasons for the change in the population of giraffes?
adaptation
artificial selection
natural selection
analogous structures
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Giraffes with short necks lived in arid regions and fed on grasses. Over time, grasses disappeared,...
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