Polarised light micrograph of a transverse cross section through the stalk of an evening primrose (Oenothera sp.) showing raphides. Raphides are calcium oxalate crystals with needle-like projections. They are a defence mechanism against predators. Magnification: x372 when printed 10 cm wide. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Mis, Marek |
Bildgröße: | 6544 px × 3985 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |