Progenitor cells are distinct biological cells that act as intermediates between stem cells and fully differentiated cells. While they share similarity with stem cells in the ability to differentiate, progenitor cells differ in key functional aspects crucial for proper tissue development and maintenance.

One fundamental property of progenitor cells is that they can divide; however, unlike stem cells, they do not remain indefinitely undifferentiated. They have a limited capacity for self-renewal, undergoing a finite number of cell divisions before differentiating into specific cell types. This distinguishes them from stem cells, which typically can divide indefinitely and maintain their undifferentiated state.

Additionally, progenitor cells are generally more lineage-committed than stem cells. They are often described as “midway” along the differentiation pathway, possessing reduced potency compared to stem cells. For example, many progenitor cells are oligopotent or multipotent but not pluripotent or totipotent.

Considering this, the correct statement about progenitor cells is:

(3) They can divide but do not remain undifferentiated.

Progenitor cells play a vital role in cellular hierarchies, acting as a transitional step that proliferates to expand the cell population before terminal differentiation. Understanding this distinction helps clarify biological processes like development, regeneration, and therapies involving cell replacement.

Answer: (3) They can divide but do not remain undifferentiated.