Early ascidian (sea squirt) embryos visualized by differential interface contrast (DIC) microscopy. Ascidians are used as a model for developmental research. Their simple embryonic development is rapi...

Early ascidian (sea squirt) embryos visualized by differential interface contrast (DIC) microscopy. Ascidians are used as a model for developmental research. Their simple embryonic development is rapi...

A human sixteen-cell embryo, also called a morula (latin for mulberry). The embryo has gone through four cycles of cell division to get to this stage and the cells have undergone compaction whereby th...

Immunofluorescence image of Human Embryonic Stem cells stained with an antibody to the active form of Bax (red) and Hoechst (blue). The distribution of Bax, an apoptosis mediator indicates that it res...

This time-lapse series illustrates the early division up to the four-cell stage of a C. elegans embryo expressing H2B::GFP by DIC and fluorescence microscopy. GFP-tagged histone H2B allows chromosome ...

This movie illustrates the early division up to the four-cell stage of a wild-type C. elegans embryo by DIC microscopy. The first C. elegans embryonic division of the P0 zygote is asymmetric and gener...

This movie illustrates the early division up to the four-cell stage of a C. elegans embryo expressing H2B::GFP by DIC and fluorescence microscopy. GFP-tagged histone H2B allows chromosome segregation ...

Scanning electron microscope image of Lytechinus pictus [sea urchin] embryo at the 2-cell stage. The fertilization envelope has been removed to reveal the cells covered with a dense meshwork of the hy...

This time-lapse series illustrates the early division up to the four-cell stage of a C. elegans embryo depleted of cdc-48 and atl-1 through RNAi. The first C. elegans embryonic division of the P0 zygo...

Transmission electron micrograph of a section through a 3-day old chick embryo obtained from an egg that was maintained in a cold room for 24 hrs. Ribosomes have crystallized both in the cytoplasm an...