A close-up of a microscopic view of a plant stem. The stem is made up of multiple layers of cells with the top layer being the largest and the bottom layer being smaller. The cells are arranged in a radial pattern with some overlapping each other. On the left side of the image there is a blue bar with the text "High pH" and "Low pH" written on it. On the right side there are two orange lines one representing the high pH and the other representing the low pH. The blue line is slightly larger than the orange line indicating that the high and low pH levels are higher than the black line. The black line is smaller than the white line and it appears to be a small spherical object with a smooth surface. The background is a light pink color and there are small white dots scattered throughout the image.
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2012
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2015
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2014
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2014
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2012
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2012
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2011
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2011
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2011
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2011
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2013
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2013
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2018
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2011
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2018
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