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Roses are red. Violets are blue. What gives flowers those eye-catching hues?

To solve the mystery of why roses are red and violets are blue, scientists are peering into the genes of plant petals. Most people don't think about why a flower is a particular color, but it's an important question for biologists. It all comes down to biochemistry: In nature, flowers come in hues that span the rainbow and pigments are the main chemicals responsible. Plants contain thousands of pigment compounds, all of which belong to three major groups: flavonoids, carotenoids and betalains. Most flower colors come from flavonoids and carotenoids.

Visit Website | Image credit: Stacey Smith