In leaves, veins subdivide repeatedly throughout mesophyll, bringing it into close contact with photosynthetic cells. Explain relationship between distribution of tissues in leaf and their functions. Thick cuticle-limits water loss. Fleshy stems-store water collected during rainy season. Reduced leaves, rolled leaves, deep roots.
Water moves down a water potential gradient.
Water moves from region of higher water potential to a region of lower water potential. Adding solutes to a region decreases its water potential. Describe the process of mineral ions uptake into roots by active transport. Absorption takes place near root tips. Soil solution flows through epidermis, crosses root cortex, passes into the stele.