Refraction is the bending of light (it also happens with sound, water and other waves) as it passes from one transparent substance into another. This bending by refraction makes it possible for us to have lenses, magnifying glasses, prisms and rainbows.
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After DNA replication has taken place, two molecules, each with one original and new strand is formed. This supports the idea of DNA replication.
Answer:
"U"-shaped, with peaks at the low and high extremes of beak size; disruptive selection
