Grass (family Poaceae) 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: x1, 300 when printed at 12cm wide. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / EYE OF SCIENCE |
Taille de l’image : | 6400 px × 6400 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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