Question

Name the plant whose flowers get pink if the soil where the grow becomes acidic and violet when the soil becomes alkaline. It's one type of phenotypic plasticity.
Name the plant.
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Answer 1

Answer:

One of the world’s most popular ornamental flowers conceals a bouquet of biological and biochemical surprises. The iconic “snowball” shaped blooms of Hydrangea macrophylla (big-leafed hydrangea) are a common staple of backyard gardens.