Final answer:
The probable factors that affect the passage of materials across cell membranes include concentration, size and time. Color does not affect the passage of materials.
Step-by-step explanation:
Probable factors that affect the passage of materials across cell membranes include concentration, size, and time. However, color does not affect the passage of materials across cell membranes. concentration gradient plays a major role in the movement of materials across cell membranes. Substances move from an area of high concentration to an area of low concentration which is known as diffusion. the size of the particles also affects the rate of diffusion. Smaller particles can diffuse more quickly than larger particles. lastly time refers to the rate at which diffusion occurs.