Final answer:
Resistance in laminar flow depends on the tube radius and viscosity according to Poiseuille's law.
Step-by-step explanation:
Poiseuille's law states that resistance in laminar flow depends on the tube radius and viscosity. The greater the radius of the tube, the lower the resistance, and the greater the flow rate. Similarly, the higher the viscosity of the fluid, the greater the resistance and the lower the flow rate. Tube length and pressure difference do not directly affect the resistance in laminar flow according to Poiseuille's law.