Pollen grains,coloured scanning electron micrograph (SEM). The characteristic outer wall,or exine,of a pollen grain is used by botanists to recognise and classify plants. Each 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 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Gschmeissner, Steve |
Taille de l’image : | 3000 px × 2113 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |