AP BIOLOGY

Detailed explanation-1: -The elongation zone contains cells that do not divide and instead elongate rapidly, about 10 times faster than meristem cells. Finally, shootward of the elongation zone comes the maturation zone, where cells neither elongate nor divide but take on their mature functions.

Detailed explanation-2: -Vacuolization is the formation of vacuoles or vacuole-like structures, within or adjacent to cells. Perinuclear vacuolization of epidermal keratinocytes is most likely inconsequential when not observed in combination with other pathologic findings.

Detailed explanation-3: -A vacuole is a membrane-bound cell organelle. In animal cells, vacuoles are generally small and help sequester waste products. In plant cells, vacuoles help maintain water balance. Sometimes a single vacuole can take up most of the interior space of the plant cell.