Spemann Experiments On Early Embryos
Which of the following statements is true regarding Spemann's experiments with two-cell-stage embryos?
ASea urchin embryos were used because vertebrate cells could not be separated without killing one of the cells.
BSome cells developed into complete, half-sized embryos, while others formed only the ventral portion of the embryo.
CThe experiments produced embryos with duplicated body axes and structures.
DAll of the separated cells developed exclusively into the ventral portion of the embryo.
EAll of the separated cells developed into complete, half-sized embryos.