#Question id: 6953
#XL - T Zoology
Maternal factors are:
#Question id: 6954
#XL - T Zoology
Between fertilization and the first cleavage division, actin filaments pull the cytoplasm of the frog egg toward the point of sperm entry in a process called:
#Question id: 6955
#XL - T Zoology
In frogs, maternally packaged Xwnt-11 leads to nuclear localization of _____ in the _____, which in response signals to adjacent cells to become the _____.
#Question id: 6956
#XL - T Zoology
The central nervous system is derived from _____, the axial skeleton is derived from _____, and the muscles of the trunk are derived from _____?
#Question id: 6957
#XL - T Zoology
The effect of grafting an extra piece of notochord into a dorsal position adjacent to pre-somitic mesoderm is
#Question id: 6958
#XL - T Zoology
Vg-1 and wnt are used in both frogs and chicks to establish a body axis, although in chicks this is the antero-posterior axis instead of the dorso-ventral axis. What is the region of the chick embryo that is thus analogous to the Nieuwkoop center?