16-cell purple urchin embryo expressing three tandem GFPs fused to the ensconsin microtubule-binding domain (EMTB-3G; Faire et al., 1999). 10 µM nocodazole was added at time 00:00. The top left cel...

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...

Microtubules in sand dollar embryo expressing three tandem GFPs fused to the ensconsin microtubule-binding domain (EMTB-3G; Faire et al., 1999). Eight-cell sand dollar embryo; single microtubules gro...

Eight-cell purple urchin embryo expressing three tandem GFPs fused to the ensconsin microtubule-binding domain (EMTB-3G; Faire et al., 1999). The embryo was treated with 20 µM nocodazole at time 00:...

Transmission electron micrograph of cell division in an insect spermatocyte captured in late anaphase - telophase with cytokinesis in progress. The homologous chromosomes appear as darkly stained disc...

First cleavage of a live mouse zygote. Clear circles are the nuclei which are in a sea of granule dense yolk. The band around the two cells is the zona pellucida.

Scanning electron microscope image of Lytechinus pictus [sea urchin] embryo at the 16-cell stage. The four large macromeres are behind the four small micromeres. The eight mesomeres are behind the mac...

The division furrow of a dividing Didinium. A thick layer of epiplasm coated on the cytosolic side by mitochondria forms the constricting ring in the furrow. As usual mucocysts lie between the epiplas...

16-cell purple urchin embryo expressing three tandem GFPs fused to the ensconsin microtubule-binding domain (EMTB-3G; Faire et al., 1999). The embryo was treated with 40 µM trichostatin A (TSA), an ...

First cleavage of a live mouse zygote. Clear circles are the nuclei which are in a sea of granule dense yolk. The band around the two cells is the zona pellucida.