Biology · Developmental Biology

The following statements are made regarding specification/determination during embryonic development in animals: A. During commitment, a cell may not appear different from its neighbours and show no visible signs of differentiation, but its developmental fate is restricted. B. At the stage of specification, cell commitment is not labile. C. A cell or tissue is determined when it is capable of differentiating autonomously even when placed into another region of the embryo or among differently specified cells. D. Cytoskeletal arrangements maintain positioning of nuclei in the syncytium, enabling specification of these nuclei by opposing morphogen gradients of Bicoid and Caudal in Drosophila. E. Capacity for 'mosaic' development allows cells to acquire different functions as a result of interactions with neighbouring cells. Which of the above statements are correct?