Multiple choice Which of the following characteristics are true for cotton fibers? Flat hose appearance Hollow core might not be visible May have frayed roots All of these answers Reveal answer Fill a bubble to check yourself D Correct answer Explanation Cotton fibers exhibit various morphological characteristics under a microscope, including a twisted, ribbon-like appearance (often described as a flat hose) and a hollow core (lumen). Frayed roots are also common in harvested cotton.