試題詳解

3. For the formation of vertebrate limb, which of the following statement is NOT TRUE?
(A) Pattern formation is the process governing the arrangement of organs and tissues in their characteristic 3-D space
(B) Pattern formation requires each embryonic cell to receive some kind of positional information indicating location along three axes of the limb
(C) The wings and legs of chicks begins with limb bud consisting of only ectoderm
(D) The apical ectodermic ridge (AER) secrets FGF (fibroblast growth factor) that promotes distal-proximal limb bud outgrowth.