An electron micrograph of a thin longitudinal section of the Yellow mutant of the unicellular green alga Chlamydomonas. Unlike cells grown in the light, the chloroplast appears fragmented and lacks t...

Confocal micrograph of a green alga, Penium margaritaceum. The cell wall is shown in green and the chloroplast is represented by autofluorescence. Honorable Mention, 2011 Olympus BioScapes Digital Ima...

Unicellular alga Penium, treated with the microtubule poison oryzalin. Fifth Prize, 2009 Olympus BioScapes Digital Imaging Competition®.

A view of the endosymbiotic Chlorella of a green Trichodina that lives on the surface of a freshwater snail collected in central Illinois. In this image there is also an endosymbiotic bacterium. It ha...

Light micrograph of volvox. Volvox are a relatively large (approximately 500 µm) green algae. They consist of hollow spherical colonies with up to 15,000 cells embedded in their gelatinous walls. E...

Appriximately longitudinal section of the unicellular alga Chlamydomonas reinhardtii showing one of the paired flagella, and the spherical nucleus surrounded by the single cup-shaped chloroplasts cont...

These Closterium algae are elongate desmids formed by two hemicells that are mirror images of each other. Although there is only a single central nucleus, each semicell has one or two axial, ridged c...

Rendered 3D projection of a confocal z-series taken of rhizome (underground portion of the stem) of Convallari majalis (Lily of the Valley). The green objects represent reconstructed chloroplasts; ce...

The single chloroplast of the unicellular alga Chlamydomonas reinhardtii contains an orange carotenoid pigment spot that functions in phototaxis. The 'eyespot' is seen in this 250 nm epon section imag...

The unicellular alga Chlamydomonas reinhardtii has a pair of anterior flagella that function in motility. In this image, the base of the flagella with basal bodies and associated structures are are cu...