Scanning electron micrograph of a fragment of surface of diatom cell. Diatoms have a silica cell wall also called a frustule that has regularly repeating features.

Mouse zona pellucida. This image shows a zona pellucida surrounding a mouse oocyte. The sample has been labeled with an antibody to ZP3, one of the three glycoproteins in the zona pellucida. The image...

A light micrograph of a thin slice through a cup fungus called Peziza. It grows on decaying wood and organic matter and reproduces itself by producing ascospores. This section shows the fungus' spore ...

Scanning electron micrograph of a diatom showing the two silica based frustule (cell walls). Image also illustrates the regular pattern on the frustule.

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®.

Scanning electron micrograph of a diatom frustule. The frustule is the hard and porous cell wall or external layer of diatoms.

Arabidopsis thaliana (thale cress) embryos imaged with confocal microscopy. Honorable Mention, 2009 Olympus BioScapes Digital Imaging Competition®.

Confocal micrograph of an Arabidopsis thaliana (thale cress) seedling. Honorable Mention, 2010 Olympus BioScapes Digital Imaging Competition®.

An electron micrograph of a thin section of a hypha of the fungal ascomycete Neurospora crassa. The cell wall, mitochondria and cytoplasmic ribosomes are prominent. Image made available by James D. Ja...