Plant Growth and Development
Biology ⇒ Plant Biology
Plant Growth and Development starts at 7 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Plant Growth and Development.
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See sample questions for grade 9
A plant is exposed to continuous light for 24 hours a day. What effect might this have on its growth?
Describe how temperature affects plant growth and development.
Describe the role of meristems in plant growth.
Describe the role of the vascular cambium in plant growth.
Explain the difference between primary and secondary growth in plants.
A farmer notices that his plants are growing tall but have weak stems. Which hormone is likely present in excess? (1) Auxin (2) Gibberellin (3) Cytokinin (4) Abscisic acid
A plant is exposed to continuous light for 24 hours a day. What effect might this have on its growth?
A student places a potted plant near a window. After a week, the plant bends towards the window. What type of growth response is this? (1) Gravitropism (2) Phototropism (3) Thigmotropism (4) Hydrotropism
A farmer notices that his plants are growing tall but have weak stems. Which hormone is likely present in excess? (1) Auxin (2) Gibberellin (3) Cytokinin (4) Abscisic acid
A seed requires which of the following conditions to germinate? (1) Water, oxygen, and suitable temperature (2) Sunlight, water, and soil (3) Water, carbon dioxide, and light (4) Oxygen, soil, and fertilizer
A student places a potted plant near a window. After a week, the plant bends towards the window. What type of growth response is this? (1) Gravitropism (2) Phototropism (3) Thigmotropism (4) Hydrotropism
Which hormone promotes fruit ripening in plants? (1) Auxin (2) Gibberellin (3) Ethylene (4) Abscisic acid
Fill in the blank: The hormone __________ is known to promote seed dormancy.
Fill in the blank: The hormone __________ is often used to promote rooting in plant cuttings.
Fill in the blank: The hormone __________ is responsible for promoting the abscission (shedding) of leaves.
Fill in the blank: The hormone __________ stimulates cell division and is often used in plant tissue culture.
True or False: Abscisic acid helps plants to survive drought conditions by closing stomata.
True or False: All plant cells can divide and contribute to growth throughout the plant's life.
True or False: All plants exhibit secondary growth.
True or False: Cytokinins delay the aging of leaves.
