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 8
Describe how a climbing plant uses thigmotropism to support itself.
Describe how abscisic acid helps plants survive during drought.
Describe what happens to a plant shoot when it is placed near a window with sunlight coming from one side.
Explain why leaves of some plants fold up at night.
Describe how a climbing plant uses thigmotropism to support itself.
Describe how abscisic acid helps plants survive during drought.
Describe what happens to a plant shoot when it is placed near a window with sunlight coming from one side.
Explain why leaves of some plants fold up at night.
Which hormone is known as the 'stress hormone' in plants? (1) Auxin (2) Gibberellin (3) Abscisic acid (4) Ethylene
Which hormone is responsible for the ripening of fruits and leaf fall? (1) Auxin (2) Ethylene (3) Gibberellin (4) Abscisic acid
Which of the following is a correct match? (1) Phototropism - response to water (2) Geotropism - response to gravity (3) Thigmotropism - response to light (4) Hydrotropism - response to touch
Which of the following is a correct statement about plant hormones? (1) They are only produced in leaves (2) They regulate plant growth and responses (3) They are not affected by environmental factors (4) They are only found in flowers
Fill in the blank: The closing of leaves in a Mimosa pudica plant when touched is an example of __________.
Fill in the blank: The growth of roots towards water is called __________.
Fill in the blank: The hormone __________ helps seeds to remain dormant until conditions are favorable for germination.
Fill in the blank: The hormone __________ is mainly responsible for promoting cell division in plants.
True or False: All plant hormones promote growth.
True or False: All plant responses to stimuli are permanent changes.
True or False: All plant responses to stimuli involve movement.
True or False: Auxins are only found in the roots of plants.
