Question

Can plant absorb insoluble food? Can you explain why?

Answer 1

Dietary fiber, dietary fibre, or sometimes roughage or rufowlete is the indigestible portion of plant foods having two main components:
soluble (may be prebiotic and/or viscous) fiber that is readily fermented in the colon into gases and physiologically active byproducts, and
insoluble fiber (may be metabolically inert and provide bulking or metabolically fermented in the large intestine as a prebiotic fiber). Bulking fibers absorb water as they move through the digestive system, easing defecation. Fermentable insoluble fibers mildly promote regularity, although not to the exent that bulking fibers do, but they can be readily fermented in the colon into gases and physiologically active byproducts.