Morphology and biochemistry.
D000715:Anatomy; D000818:Animals; D001669:Biochemical Phenomena; D001671:Biochemistry; D002454:Cell Differentiation; D004330:Drosophila / Q000254:growth & development; D004625:Embryo, Nonmammalian; D005786:Gene Expression Regulation; D006801:Humans; D008675:Metamorphosis, Biological; D008870:Microtubules / Q000648:ultrastructure; D008968:Molecular Conformation; D009024:Morphogenesis; D014780:Viruses / Q000648:ultrastructure; D014982:Xenopus laevis / Q000196:embryology