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A potted plant is growing in a transparent glass jar. In this plant, X and Y are the two growing parts having a lot of meristematic tissue. It is observed that the part X of this plant exhibits positive geotropism but negative phototropism. On the other hand, part Y of this plant exhibits negative geotropism but positive phototropism.
(a) Name the part X of plant.
(b) Name the part Y of plant.
(c) Which part of the plant, X or Y, will exhibit positive hydrotropism?
(d) Which part of the plant, X or Y, can have tendrils on it ?
(e) Which phytohormone causes the part X to exhibit negative phototropism?
(a) The part X is the root. (b) The part Y is the shoot. (c) The part X (root) will exhibit positive hydrotropism. (d) The part Y (shoot) could have tendrils on it. (e) The phytohormone, auxin causes part X (root) to exhibit negative phototropism.