Plant roots navigate in the soil environment following the gravity vector. Cell divisions in the meristem and rapid cell growth in the elongation zone propel the root tips through the soil. Actively elongating cells acidify their apoplast to enable cell wall extension by the activity of plasma membrane AHA H+-ATPases. https://www.bekindtopets.com/super-pick-Rx-Quadruple-Topical-Ointment-Quadritrop-for-Dogs-Cats-30-mL-super-grab/