Plant Responses to Stimuli
Biology ⇒ Plant Biology
Plant Responses to Stimuli starts at 8 and continues till grade 12.
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See sample questions for grade 11
A plant is exposed to light from only one direction. After several days, the stem bends toward the light source. Which hormone is most likely responsible for this response?
A student places a potted plant on its side. After a few days, the shoot bends upward. What type of response is this?
Describe how plants detect and respond to mechanical stimuli such as wind or touch.
Describe the difference between positive and negative tropism.
Describe the process of thigmonasty in plants.
Describe the role of abscisic acid in plant response to drought.
A plant is exposed to light from only one direction. After several days, the stem bends toward the light source. Which hormone is most likely responsible for this response?
A student places a potted plant on its side. After a few days, the shoot bends upward. What type of response is this?
Which hormone is most closely associated with fruit ripening and leaf abscission? (1) Auxin (2) Gibberellin (3) Ethylene (4) Cytokinin
Which hormone is responsible for stem elongation and seed germination? (1) Gibberellin (2) Ethylene (3) Abscisic acid (4) Cytokinin
Which of the following best describes phototropism? (1) Growth in response to water (2) Growth in response to light (3) Growth in response to gravity (4) Growth in response to touch
Which of the following best describes thigmotropism? (1) Response to gravity (2) Response to water (3) Response to touch (4) Response to light
Fill in the blank: The bending of a sunflower head to follow the sun is called __________.
Fill in the blank: The directional growth of a plant in response to gravity is called __________.
Fill in the blank: The hormone __________ is involved in the closing of stomata during water stress.
Fill in the blank: The hormone __________ is involved in the induction of seed dormancy.
True or False: All plant hormones act independently and do not interact with each other.
True or False: All plant responses to stimuli involve growth.
True or False: Cytokinins promote cell division in plant tissues.
True or False: Gravitropism is the response of a plant to light.
