A. Living cells of epidermis with higher turgor pressure. B. Living cells of cortex and pith with higher turgor pressure. C. Collenchyma cells D. All of these
A. Large number of vacoules in a plant cell. B. Higher ionic concentration inside vacuoles resulting from active pumping of ions at their tonoplastic membrane C. Higher osmotic pressure of the cell vacuole D. Both b and c
A. Primary xylem and secondary xylem. B. Primary xylem and secondary phloem. C. Primary xylem and primary phloem D. Secondary xylem and secondary phloem.
A. Positive phototropism and negative geotropism B. Negative phototropism and positive geotropism C. Negative tactic movement and positive tropic movement D. Positive geotropism of stem and roots
