Which vascular plant organ is most dependent on surface area to carry out its
function?

Each plant organ (roots, stems, leaves) contains all three tissue types: ... Vascular tissue is made of two specialized conducting tissues: xylem and phloem. Xylem tissue transports water and nutrients from the roots to different parts of the plant, and also plays a role in structural support in the stem.

the answer is d (apex) good luck : ))

the backbone of the dna and rna compound is sugar phosphate.