"Embryological development" refers to the process in which an embryo (early stage of development) grows and develops into a more complex organism. Full definition
By comparing the structures and embryological development of the eye in vertebrate species, however, researchers have gained key insights into the organ's origin, as this article in the July issue of Scientific American explains. (scientificamerican.com)
Mammalian development was once thought to be essentially different from embryological development in fruit flies, frogs, worms, and other laboratory organisms, where well - defined polarities in the egg — higher concentrations of a protein in one part of the egg than in another, for example — ordained such fundamental aspects of body plan as head and tail, or back and belly. (discovermagazine.com)
Look at embryological development, genes, speciation and other concepts. (religion.blogs.cnn.com)