A close-up of a microscopic view of a plant stem. The stem appears to be 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 white line. The white line is smaller than the black line and it is likely a small amount of water droplets or particles that are scattered throughout the image. The background is a light pink color which contrasts with the dark brown of the stem.

• Photograph

• Outreach and Education