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
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Answer:
x is Root tip.
y is shoot tip.
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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 the plant.
(b) Name the part Y of the 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?
answer:
(a) Root. Because root shows positive geotropism and negative phototropism.
(b) Stem (or Shoot). Because stem shows negative geotropism but positive phototropism
(c) X. Because root exhibit positive hydrotropism and it is X denotes root.
(d) Y.Because stem can have tendrils on it. It is Y denotes stem.
(e) Auxin. Because it is the phytohormone that causes the part X(root) to exhibit negative phototropism.