Iris pollen grains,coloured scanning electron micrograph (SEM). Pollen grains,containing the male sex cells (gametes),are reproductive structures produced by the male parts of flowering plants. The structure shown is the hard outer casing (exine) that protects the gametes during transit between flowers. Magnification: x190 when printed at 10 centimetres across | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Hughes, Louise |
Taille de l’image : | 3484 px × 2581 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |