Silver birch (Betula pendulata) pollen grain,coloured scanning electron micrograph (SEM). A pollen grain contains a male gamete (reproductive cell) that is intended to fertilise an egg or ovule (female gamete),and initiate the formation of a seed for a new plant. Magnification: x2750 when printed at 10 centimetres wide | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Gschmeissner, Steve |
Taille de l’image : | 4181 px × 4186 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |