Anatomy Of Flowering Plants

The key lies in the annual growth ring that forms in temperate zones. Each year a tree produces:a lighter, thin-walled “spring wood” (earlywood)followed by a darker, thick-walled “late wood” (summerwood)By counting those spring + late wood pairs you get the tree’s age.Answer: Option A.

Casparian strips are suberized structures located on the tangential and radial walls of the endodermis, which is the innermost layer of the root cortex in plants. These strips are not derived from the epidermal cell layer; instead, they are part of the endodermal cells that regulate water and mineral uptake in roots.