Pollen. Coloured scanning electron micrograph (SEM) of pollen grains on a catkin flower. A catkin is a spike of unisexual flowers with small leaves (bracts) instead of petals. Catkins are found on wind pollinated plants,such as birches and willows. Pollen grains are the male sex cells (gametes) of flowering plants. Magnification: x475 at 6x7cm size | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Gschmeissner, Steve |
Taille de l’image : | 2056 px × 1853 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |