[biological_process] animal organ morphogenesis <sep> dorsal/ventral pattern formation <sep> fibroblast growth factor receptor signaling pathway <sep> midbrain-hindbrain boundary development <sep> neuron differentiation <sep> pattern specification process <sep> positive regulation of cell division <sep> positive regulation of cell population proliferation <sep> positive regulation of gene expression <sep> positive regulation of MAPK cascade <sep> positive regulation of protein phosphorylation <sep> regulation of cell migration