Buttercup stem. Coloured scanning electron micrograph (SEM) of a section through the stem of a buttercup (Ranunculus sp.) plant. At centre right is a spiral of lignin,a woody substance that wraps around a xylem vessel to strengthen it. Xylem vessels transport water and mineral nutrients around the plant | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Power And Syred |
Bildgröße: | 4720 px × 3730 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |