Eric Davidson sequenced this organism's genome. This organism is the source of a cis-regulatory element composed of Modules A and B: the transcriptional switch endo16.
Eric Davidson sequenced this organism's genome. This organism is the source of a cis-regulatory element composed of Modules A and B: the transcriptional switch endo16. The fourteen-residue peptide resact is a chemoattractant for these species. Their life cycles include a pluteus larva. Tim Hunt discovered cyclins while studying these animals. Robert Paine discovered "barrens" enriched in these organisms. In a mechanism first studied in this animal, (*) cortical granules elevate the vitelline layer and create a hard coat over the cell membrane. Hans Dreisch cloned these organisms by separating their embryos. This organism does not have a zona pellucida, and instead relies on the fast block and acrosomal reaction to block polyspermy. Its transparent eggs are used to study fertilization. For 10 points, name this model echinoderm kept in check by keystone predators like otters.
Eric Davidson sequenced this organism's genome. This organism is the source of a cis-regulatory element composed of Modules A and B: the transcriptional switch endo16.
sea urchins [or Echinoidea; or Strongylocentrotus purpuratus; or purple sea urchin; or Atlantic sea urchin]