Coloured scanning electron micrograph (SEM) of a freeze-fractured Nasturtium stem, showing numerous vascular bundles (such as at upper centre) with an inner xylem (pink) and outer phloem (yellow). — Stock photos

"Coloured scanning electron micrograph (SEM) of a freeze-fractured Nasturtium stem, showing numerous vascular bundles (such as at upper centre) with an inner xylem (pink) and outer phloem (yellow)." is an authentic stock image by ScienceRF. It’s available in the following resolutions: 1600 x 1208px, 2600 x 1963px, 4850 x 3661px. The minimum price for an image is 49$. Image in the highest quality is 4850 x 3661px, 300 dpi, and costs 449$.