Scanning electron microscope image of Penta lanceolata anther (pollen bearing part of the stamen).

Scanning electron microscope image of Penta lanceolata anther, with unacetolyzed pollen on the surface.

Individual deep cell moving by circus movements. Fundulus heteroclitus(killifish) embryo injected with GFP-actin plasmid at 1-cell stage, filmed during gastrulation. Image made available through Zebra...

Individual deep cell moving by circus movements. Fundulus heteroclitus(killifish) embryo. Images made available through Mark Cooper and Zebrafish The Living Laboratory.

Xenopus gastrulation. Video made available through Mark Cooper and Zebrafish - The Living Laboratory.

The low magnification overview of Zebrafish development covering cleavage through segmentation stages. Reproduced with permission from Karlstrom RO, Kane DA A flipbook of zebrafish embryogenesis. Deve...

Zebrafish development from early cell division to axiation and onset of muscular contractions. Video made avaialable through Mark Cooper and Zebrafish - The Living Laboratory.

Yolk syncytial layer cell nuclei exhibit convergence and extension behaviors during late gastrulation. Video made available by Mark Cooper through Zebrafish - The Living Laboratory.

This cross section shows a human fetal testis. Numerous seminiferous tubules appear within a lobe of the testis. It has not been treated with an antibody but is autofluorescent and therefore appears b...

Leishmania mexicana promastigote forms (WHO strain MNYC/BZ/62/M379). Cells were grown in M199 culture medium and fixed with glutaraldehyde, dehydrated in ethanol, critical-point dried and sputter coat...