Prepare for NEET Biology Plant Growth and Development with MCQs & PYQs on NEET.GUIDE. Get free practice, previous year questions, and expert insights on plant hormones and growth regulators.
Besides the Avena curvature test, which of the following can also be used to bioassay auxin?
Seed germination rate
Flowering time
Root elongation inhibition
Fruit ripening rate
Which plant demonstrates minimal morphological changes in response to varying light intensities?
Sunflower
Cotton
Maize
Bean
Among the following, which plant shows the least phenotypic variation in response to water availability?
A desert cactus
A grassland wildflower
A submerged aquatic plant
A deciduous tree
In plant tissue culture, the formation of callus from explants, such as leaf mesophyll cells, is an example of:
Redifferentiation
Dedifferentiation
Totipotency
Pleiotropy
During tissue culture, if parenchyma cells from a potato tuber are used to generate callus, what process are the cells undergoing?
Redifferentiation
Transdifferentiation
Dedifferentiation
Cell elongation
Which of the following phytohormones is used to shorten the time to seed production in young conifer trees?
Auxins
Cytokinins
Gibberellins
Abscisic Acid
Early seed production in conifers can be achieved by the exogenous application of:
Ethylene
Auxins
Gibberellins
Cytokinins
Farmers often use a specific plant hormone to boost sugarcane yield. This hormone primarily affects which aspect of the plant's growth?
Root Development
Flowering
Fruit Ripening
Stem Elongation
A gardener uses a synthetic auxin to control broadleaf weeds in his lawn. The grass, a monocot, remains unaffected. This is primarily due to:
Enhanced auxin metabolism in monocots
Lower auxin sensitivity in monocots
Reduced auxin uptake in monocots
Increased auxin tolerance in monocots
If a farmer wants to selectively eliminate dicot weeds from a field of monocot crops, which plant growth regulator would be most suitable?
Gibberellin
Cytokinin
Auxin
Abscisic acid
