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By: Kate MacCord | Published: Dec 02, 2013

Ectoderm is one of three germ layers--groups of cells that coalesce early during the embryonic life of all animals except maybe sponges, and from…

By: Samuel Philbrick, Erica O'Neil | Published: Jan 12, 2012

The Spemann-Mangold organizer, also known as the Spemann organizer, is a cluster of cells in the developing embryo of an amphibian that induces…