Examlex
Which one of the following dienes is most stable?
Fetus
A developing mammal or human from the end of the embryonic stage, recognizably human in form, until birth.
Amnion
A thin membrane forming a closed sac around the embryo in amniotes, containing the amniotic fluid, which provides a protective environment.
Gastrula
An early stage in embryonic development that follows the blastula, characterized by the formation of germ layers.
Archenteron
is the primary gut that forms during early embryonic development in animals, leading to the formation of the digestive tract.
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