![](https://nthumb.tpgimages.com/mid2_ocom_img/c2NpZW5jZV9waG90bw==/20110407_rm/2011040816/top_20110408161332_2082.jpg/TOP07422235.jpg)
Birch pollen grain, coloured scanning electron micrograph (SEM). The pollen grain of the birch tree (Betula) is highly allergic. It is transported by the wind, and so is light with a smooth, non-sticky surface to aid its dispersal over distances of thousands of kilometres. Pollen grains are reproductive structures produced by the male parts of flowering plants.
px | px | dpi | = | cm | x | cm | = | MB |
Details
Creative#:
TOP07422235
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
NO
Property Release:
NO
Right to Privacy:
No
Same folder images: