Read the previous section: Larvae as the epitome of evolution. By the end of the 19th century, a series of biologists had dedicated themselves to following and discovering the fate of individual cells of an embryo during ontogeny. These works, known as cell lineage studies1, were critical to disambiguate the relationship between ontogeny and phylogeny, […]
Tag: spiral cleavage
Spiral cleavage is a (fantastic) pattern of embryonic cell divisions that occurs in annelids, molluscs and other animals.