Plant - Growth and Development PYQ

Read the following statements on plant growth and development. (A) Parthenocarpy can be induced by auxins. (B) Plant growth regulators can be involved in promotion as well as inhibition of growth. (C) Dedifferentiation is a pre-requisite for re-differentiation. (D) Abscisic acid is a plant growth promoter. (E) Apical dominance promotes the growth of lateral buds. Choose the option with all correct statements.

Which one of the following phytohormones promotes nutrient mobilization which helps in the delay of leaf senescence in plants?

Given below are some statements about plant growth regulators. A. All GAs are acidic in nature. B. Auxins are antagonists to GAs. C. Zeatin was isolated from coconut milk. D. Ethylene induces flowering in Mango. E. Abscisic acid induces parthenocarpy. Choose the correct set of statements from the options given below:

F. Skoog observed that callus proliferated from the internodal segments of tobacco stem when auxin was supplied with one of the following except :

Match List-I with List-II : \begin{array}{lll} & List-I & & List-II \\A.& Abscisic acid & I.& Promotes female flowers in cucumber \\B.& Ethylene & II.& Helps seeds to withstand desiccation \\C.& Gibberellin & III.& Helps in nutrient mobilisation \\D. & Cytokinin & IV.& Promotes bolting in beet, cabbage etc\end{array} Choose the correct answer from the options given below:

Auxin is used by gardeners to prepare weed-free lawns. But no damage is caused to grass as auxin

Spraying sugarcane crop with which of the following plant growth regulators, increases the length of stem, thus, increasing the yield?

Spraying of which of the following phytohormone on juvenile conifers helps in hastening the maturity period, that leads to early seed production?

Which hormone promotes internode / petiole elongation in deep water rice?

The phenomenon which is influenced by auxin and also played a major role in its discovery :

Which of the following statements is not correct?

Match List-I with List-II  Choose the correct answer from the options given below:

In tissue culture experiments, leaf mesophyll cells are put in a culture medium to form callus. This phenomenon may be called as:

Which one of the following plants does not show plasticity?

The ability of plants to follow different pathways in response to environment leading to formation of different kinds of structures is called :

The gaseous plant growth regulator is used in plants to:

Which of the following growth regulators is an adenine derivative?

Production of Cucumber has increased manifold in recent years. Application of which of the following phytohormones has resulted in this increased yield as the hormone is known to produce female flowers in the plants :

The plant hormone used to destroy weeds in a field is:

Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called:

Inhibitory substances in dormant seeds cannot be removed by subjecting seeds to:

Match the following concerning the activity/function and the phytohormone involved:- <table class="pyq-table"><tbody><tr><td>(a)</td><td>Fruit ripener</td><td>(i)</td><td>Abscisic acid</td></tr><tr><td>(b)</td><td>Herbicide</td><td>(ii)</td><td>${\mathrm{GA}}_{3}$</td></tr><tr><td>(c)</td><td>Bolting agent</td><td>(iii)</td><td>$2,4-D$</td></tr><tr><td>(d)</td><td>Stress hormone</td><td>(iv)</td><td>Ethephon</td></tr></tbody></table>Select the correct option from following:-

Who coined the term 'Kinetin'?

Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.