What is Considered to Be the First Evidence of Differentiation

Question

What is considered to be the first evidence of differentiation in the cells of an embryo?
A)cell division occurring after fertilization
B)the occurrence of mRNAs for the production of tissue-specific proteins
C)determination of specific cells for certain functions
D)changes in the size and shape of the cell
E)changes resulting from induction

Accepted Answer

The occurrence of mRNAs for the production of tissue-specific proteins is considered the first evidence of differentiation in the cells of an embryo, as it indicates that certain cells are beginning to produce proteins specific to their future functions, marking the start of the process where cells start to take on distinct roles.