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 12
A student observes that a plant's leaves close rapidly when touched. What type of movement is this, and what is its adaptive advantage?
Describe how plants can use volatile organic compounds (VOCs) in response to herbivore attack.
Describe how plants use chemical signals to defend against herbivores.
Describe the difference between tropic and nastic movements in plants.
Describe the process of signal amplification in plant responses to stimuli.
Describe the process of thigmonasty in Mimosa pudica.
Describe the role of phytochrome in photoperiodism.
A student observes that a plant's leaves close rapidly when touched. What type of movement is this, and what is its adaptive advantage?
A plant is exposed to unilateral light. Which side of the stem will have a higher concentration of auxin? (1) The side facing the light (2) The shaded side (3) Both sides equally (4) The lower side
Which hormone is mainly responsible for closing stomata during water stress? (1) Auxin (2) Abscisic acid (3) Gibberellin (4) Cytokinin
Which hormone is most closely associated with seed dormancy? (1) Gibberellin (2) Cytokinin (3) Abscisic acid (4) Ethylene
Which hormone is primarily responsible for apical dominance in plants? (1) Gibberellin (2) Auxin (3) Cytokinin (4) Ethylene
Fill in the blank: The downward growth of roots in response to gravity is called __________.
Fill in the blank: The hormone __________ is involved in the abscission of leaves and fruit.
Fill in the blank: The hormone __________ is known to delay leaf senescence and promote cell division.
Fill in the blank: The hormone __________ is often associated with the promotion of cell elongation and breaking seed dormancy.
True or False: All plant responses to stimuli involve growth.
True or False: Cytokinins promote lateral bud growth and can counteract apical dominance.
True or False: Gravitropism in shoots is negative, while in roots it is positive.
True or False: Hydrotropism is more pronounced in roots than in shoots.
