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 9
A plant is placed in a dark room with a single window. After a week, the plant bends towards the window. What type of response is this?
A student places a potted plant on its side. After a few days, the stem 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 auxin distribution causes a plant stem to bend towards light.
Describe how plants use photoperiodism to control flowering.
Describe the difference between positive and negative tropism, giving one example of each.
Describe the role of abscisic acid in plant responses to drought.
Explain why roots grow downwards even when a seed is planted upside down.
Explain why some desert plants open their stomata at night instead of during the day.
Explain why some plants close their flowers at night.
Explain why sunflowers turn their heads to follow the sun during the day.
What is the adaptive advantage of thigmotropism in climbing plants?
What is the main difference between tropic and nastic movements in plants?
What is the main function of gibberellins in plants?
What is the term for a plant's movement in response to light?
A scientist places two identical plants in separate rooms. In Room A, the plant is exposed to constant light, while in Room B, the plant experiences 12 hours of light followed by 12 hours of darkness each day. After two weeks, the plant in Room B begins to flower, but the plant in Room A does not. Explain the biological mechanism behind this difference in flowering.
A student observes that a certain plant species closes its leaves rapidly when touched, but the leaves reopen after a few minutes. Is this response considered a growth movement? Explain your answer.
Describe how the redistribution of auxin in a plant stem leads to differential growth during phototropism.
Describe one way in which plant responses to abiotic stimuli differ from responses to biotic stimuli, providing an example for each.
Explain why roots of a plant growing in a tilted pot still grow downward, even though the direction of gravity relative to the pot has changed.
