A researcher isolates stem cells from a developing embryo and finds that they are able to differentiate only into liver cells or pancreatic cells. The isolated stem cells are likely from the:
A)morula.
B)gastrula.
C)ectoderm.
D)mesoderm.
E)endoderm.

Question

Quizplus · Accepted Answer

The stem cells that are able to differentiate into liver cells or pancreatic cells only are likely from the endoderm, as this germ layer gives rise to these two organs during embryonic development. The morula is an early stage of development, and the gastrula is when germ layers first form, but it is the endoderm specifically that gives rise to the liver and pancreas. The ectoderm gives rise to tissues such as the nervous system and skin, while the mesoderm gives rise to tissues like muscle and bone.

A Researcher Isolates Stem Cells from a Developing Embryo and Finds