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Watercolor illustration of the letters N, J, Y represented as a pH scale, a chloroplast, and an endoscope.

Watercolor illustration of the letters N, J, Y represented as a pH scale, a chloroplast, and an endoscope.
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pH scale with litmus paper (preferably measuring an acid or a base as a bubble letter N) and beside that organelle of the plant cell chloroplast as a bubble capital letter J and beside that a bubble captial letter Y as an endoscope (which shows total internal reflection). See more

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