Question

choreographers of matter, life, and intelligence by the end of the twentieth century, science had reached the end of an era, unlocking the secrets of the atom, unraveling the molecule of life, and creating the electronic computer. with these three fundamental discoveries, triggered by the quantum revolution, the dna revolution, and the computer revolution, the basic laws of matter, life, and computation were, in the main, finally solved. —visions, michio kaku identify a key term in this passage. revolution complete check all of the clues that would help someone identify this key term. the title or section heading the first or last sentence a repeated word or phrase a signal word or phrase done

Explanation:

To identify the clues for the key term "revolution":

• "a repeated word or phrase": The word "revolution" appears three times (quantum revolution, DNA revolution, computer revolution), so this is a clue.
• "the title or section heading" does not directly relate to "revolution" as the title is about choreographers of matter, life, and intelligence.
• "the first or last sentence" do not contain "revolution" (first sentence is about science reaching an era's end, last about laws being solved), so not a clue.
• "a signal word or phrase" is not relevant here as "revolution" is repeated, not signaled by a transition word.

Answer:

• a repeated word or phrase