Plant Responses to Stimuli
Biology ⇒ Plant Biology
Plant Responses to Stimuli starts at 8 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Plant Responses to Stimuli.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 10
A plant bends toward a window where sunlight is coming in. What is this response called?
A plant's leaves fold up at night and open during the day. What type of movement is this?
A student places a potted plant on its side. After a few days, the shoot bends upward. What type of response is this?
A Venus flytrap snaps shut when an insect touches its hairs. Is this a tropic or nastic movement?
Describe how plants use photoperiodism to regulate flowering.
Describe the difference between positive and negative tropism.
Describe the process of gravitropism in roots and shoots.
Describe what happens during thigmotropism in climbing plants.
Explain how auxin distribution causes a plant stem to bend toward light.
Explain the role of abscisic acid in plant responses to drought.
Explain why roots grow toward moisture in the soil.
Explain why some plants flower only when days are short.
What is the term for a plant's growth response toward or away from a stimulus?
Which part of the plant usually shows positive phototropism?
A plant is placed in a growth chamber with a 24-hour cycle of 8 hours of light and 16 hours of darkness. After several weeks, the plant fails to flower. What could be a possible explanation for this response?
A researcher notices that a certain plant species only flowers when exposed to more than 14 hours of daylight. What is the term for this type of plant, and what is the biological significance of this response?
A scientist exposes a group of seedlings to constant light but varies the direction of gravity by rotating the pots every 12 hours. Predict and explain how the seedlings' shoots and roots will grow under these conditions.
Describe the mechanism by which the hormone ethylene causes leaf abscission in deciduous plants.
Explain how the redistribution of auxin in a plant stem exposed to unilateral light leads to phototropic curvature.
Which plant hormone is primarily responsible for the inhibition of lateral bud growth, and how does this relate to apical dominance?
