Final answer:
The statement that nuclear factors vary from cell types is true, as different cells express diverse nuclear factors for gene regulation. Eukaryotic cells have a nucleus with a non-solid outer surface, and cell types like B cells and T cells have unique genes and responses.
Step-by-step explanation:
The statement that nuclear factors vary from cell types is true. This is because different cell types express a variety of regulatory proteins that influence gene expression, including nuclear factors such as transcription factors, enhancers, and activators. For example, eukaryotic cells have a nucleus that contains most of their genetic material, and the outer surface of this nucleus is comprised of a nuclear envelope with nuclear pores that control the passage of substances in and out, thus it is not completely solid.
In addition, each cell type, such as B cells and T cells in the immune system, contain different genes which produce different receptors that bind to the same ligands, triggering distinct responses in each cell type. The diversity in nuclear factors and their regulation allows cells to perform their unique functions even though they all depend on their surroundings to provide energy.