Which is the significance of the tunica in plant growth?
a) In the tunica, cell divisions are perpendicular to the stem axis, giving rise to thick layers of tissues covering the outside of the tip.
b) In the tunica, cell divisions are parallel to the stem axis, giving rise to thick layers of tissues covering the inside of the tip
c) In the tunica, cell divisions are parallel to the stem axis, giving rise to thin layers of tissues covering the inside of the tip