Complex sentence: The general effect she demonstrated is known as embryonic induction, that is, the capacity of some cells to direct the developmental trajectory of other cells; and it remains a fundamental concept and area of ongoing research in the field.
Split into simpler sentences: The general effect she demonstrated is known as embryonic induction, that is, the capacity of some cells to direct the developmental trajectory of other cells. Induction remains a fundamental concept and area of ongoing research in the field.