Question

Study the following statements.
I. X hormone promotes cell elongation and helps in the increase in the length of the plant.
II. Y hormone induces flowering in mango and also promotes rapid internode/petiole elongation in deep plants and hence helping leaves or upper parts of shoot above water.
III. Z hormone inhibits the seed germination, increase the tolerance of plant to various stresses, play important role in seed development, maturation and dormancy.
Identify the correct names of hormones marked as X, Y and Z.

• A. Y- ABA, X- Auxin, Z- GA
• B. Z- GA, X- Auxin, Y- C${}_2$H${}_4$
• C. Y- Auxin, X- C${}_2$H${}_4$, Z- GA
• D. Y- GA, X- C${}_2$H${}_4$, Z- ABA

Answer 1

The correct option is D Y- GA, X- C${}_2$H${}_4$, Z- ABA

X hormone is gibberellin that promotes cell elongation and helps in the increase in the length of the plant.

Y hormone is ethylene (C2H4) that induces flowering in mango and also promotes rapid internode/petiole elongation in deep plants and hence helping leaves or upper parts of shoot above water.

Z hormone is abscisic acid that inhibits the seed germination, increase the tolerance of the plant to various stresses, play important role in seed development, maturation and dormancy.

Thus, the correct answer is option D.