Plant Growth and Development · Biology · NEET
MCQ (Single Correct Answer)
Which of the following plant growth regulators promotes internode elongation prior to flowering in cabbage?
Which of the following plant growth regulators is used as herbicide?
Length of the stem at time 0 is 20 cm . The arithmetic growth rate is 30 cm per day. What is the length of the stem at the end of the $7^{\text {th }}$ day?
Which one of the following is not a characteristic of plant cells in the phase of elongation?
$$ \text { Match List-I with List-II } $$
| List-I (Growth Regulator) |
List-II (Function/Effect) |
||
|---|---|---|---|
| A. | $$ \text { 2,4-D } $$ |
I. | Brewing industry |
| B. | $$ \mathrm{GA}_3 $$ |
II. | Stimulation of stomatal closure |
| C. | Kinetin | III. | Herbicide |
| D. | ABA | IV. | Nutrient mobilisation |
Heterophyllous development in response to environment is an example of which of the following phenomena?
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?
Match List-I with List-II :
| 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. |
Choose the correct answer 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 :
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 :
Auxin is used by gardeners to prepare weed-free lawns. But no damage is caused to grass as auxin
Formation of interfascicular cambium from fully developed parenchyma cells is an example for
Spraying sugarcane crop with which of the following plant growth regulators, increases the length of stem, thus, increasing the yield?
The phenomenon which is influenced by auxin and also played a major role in its discovery :
Match List - I with List - II.
| List - I | List - II | ||
|---|---|---|---|
| (A) | Auxin | (I) | Promotes female flower formation in cucumber |
| (B) | Gibberellin | (II) | Overcoming apical dominance |
| (C) | Cytokinin | (III) | Increase in the length of grape stalks |
| (D) | Ethylene | (IV) | Promotes flowering in pineapple |
Choose the correct answer from the options given below :
Which of the following statements is not correct ?
Spraying of which of the following phytohormone on juvenile conifers helps hastening the maturity period, that leads early seed production?
Which hormone promotes internode/petiole elongation in deep water rice?
The ability of plants to follow different pathways in response to environment leading to formation of different kinds of structures is called
Which of the following growth regulators is an adenine derivative?
Which one of the following plants does not show plasticity?
The gaseous plant growth regulator is used in plants to:
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: