Plant Hormones
Biology ⇒ Plant Biology
Plant Hormones starts at 9 and continues till grade 12.
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See sample questions for grade 10
A farmer wants to delay the ripening of bananas during transport. Which hormone's action should be minimized?
A plant is exposed to light from one side only. Which hormone will redistribute to the shaded side, causing the plant to bend toward the light?
A scientist applies a hormone to a plant and observes increased cell elongation in the stem. Which hormone was most likely applied?
Describe how ethylene affects fruit ripening.
Describe one agricultural use of plant hormones.
Describe the effect of auxin concentration on root and shoot growth.
Describe the role of auxins in phototropism.
Explain the interaction between auxins and cytokinins in controlling plant growth.
Explain what is meant by 'apical dominance' in plants.
Explain why abscisic acid is important for plant survival during drought.
Name two functions of gibberellins in plants.
Which hormone is most likely to be found in higher concentrations in a seed that is not germinating?
Which hormone is primarily involved in the closing of stomata during water stress?
A plant is genetically modified to overproduce cytokinins. Predict and explain two possible effects this could have on the plant's growth and development.
A researcher observes that a plant kept in the dark for several days shows elongated stems and pale leaves. Which hormone is most likely responsible for this response, and what is the name of this phenomenon?
Describe how abscisic acid and gibberellins have opposite effects on seed dormancy and germination.
Explain how the balance between auxins and cytokinins can influence whether a plant tissue culture develops into roots or shoots.
Explain why applying auxin to the cut end of a plant stem can promote the formation of roots.
