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12 questions
Which process best describes how beneficial traits become more common in a population over generations?
A population of beetles has green and brown coloration. Birds more often eat green beetles. After several generations brown beetles increase. Which element is required for this change?
Which line of evidence most directly supports common ancestry between species?
Which scenario is an example of speciation by geographic isolation?
Researchers compare DNA sequences of two bird populations and find consistent genetic differences that prevent successful interbreeding. This evidence most directly supports which claim?
Which best explains how adaptations arise?
Genetic variation within a population is essential for natural selection to produce evolutionary change.
Fossil sequences that show intermediate forms are evidence that species can change over time.
Convergent evolution (similar traits in unrelated lineages) is strong evidence of common ancestry.
Explain how a branching (tree-style) pattern of relationships is used to reason about speciation and common ancestry.
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