Some acritarchs showing the diversity of forms within the group. Images from UCL.

pollen

Goat-willow pollen - Rob Kesseler

Geranium pollen. Coloured scanning electron micrograph (SEM) of pollen (pink) on the stamen of a geranium flower (Geranium sp.). The stamens are male reproductive structures that consist of a filament topped by a pollen-bearing anther. Pollen grains are the male sex cells of a flowering plant. Credit: SUSUMU NISHINAGA/SCIENCE PHOTO LIBRARY

Sunflower pollen grains

Ceratium tripos; Ornithocercus magnificus; Ceratocorys horrida; Goniodoma…

Dinoflagellat; If only you could see what I have seen with your eyes - but…

This is what causes a "red tide" - A particular type of Dinoflagellate. When…

Dinoflagellates are very small marine plankton that when in a group produce a…

Dinoflagellates are unicellular organisms that are photosynthetic, some of them…