If cells from the presumptive neural ectoderm of a late frog gastrula are transplanted onto the surface of a second late frog gastrula where skin would normally develop, the transplanted cells will still develop into neural tissue.This experiment shows that the transplanted cells are
A) differentiated.
B) totipotent.
C) discontinuous.
D) determined.
E) endodermal.

Question

Quizplus · Accepted Answer

The experiment shows that the transplanted cells have already made the decision (determined) to develop into neural tissue and are not influenced by their new environment on the surface of the second gastrula, which would normally develop into skin. This suggests that the cells are already committed to a specific fate and are not totipotent. It also suggests that they are not endodermal or discontinuous. Therefore, the best choice is D) determined.

If Cells from the Presumptive Neural Ectoderm of a Late