Plant Growth and Development
Biology ⇒ Plant Biology
Plant Growth and Development starts at 7 and continues till grade 12.
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See sample questions for grade 12
A plant is exposed to continuous darkness. What effect will this have on a long-day plant's flowering?
A plant is exposed to gravity in a horizontal position. Which part of the root will show the most growth?
A plant is grown in a nutrient solution lacking nitrogen. Predict the effect on its growth and development.
Describe how auxins affect apical dominance in plants.
A plant is exposed to continuous darkness. What effect will this have on a long-day plant's flowering?
A plant is exposed to gravity in a horizontal position. Which part of the root will show the most growth?
A plant is grown in a nutrient solution lacking nitrogen. Predict the effect on its growth and development.
A seed is placed in moist soil and kept at a suitable temperature. Which of the following is most likely to occur first? (1) Emergence of the radicle (2) Emergence of the plumule (3) Leaf formation (4) Flowering
A seed is placed in moist soil and kept at a suitable temperature. Which of the following is most likely to occur first? (1) Emergence of the radicle (2) Emergence of the plumule (3) Leaf formation (4) Flowering
Which hormone is known as the 'stress hormone' in plants? (1) Auxin (2) Cytokinin (3) Abscisic acid (4) Ethylene
Which hormone is most closely associated with the delay of leaf senescence? (1) Auxin (2) Cytokinin (3) Gibberellin (4) Ethylene
Which hormone is responsible for closing stomata during water stress? (1) Auxin (2) Gibberellin (3) Abscisic acid (4) Cytokinin
Fill in the blank: The hormone responsible for breaking seed dormancy and promoting germination is __________.
Fill in the blank: The increase in girth of a woody plant is mainly due to the activity of the __________.
Fill in the blank: The movement of a plant in response to touch is called __________.
Fill in the blank: The process by which plants lose water vapor through stomata is called __________.
True or False: All plant hormones act independently and do not interact with each other.
True or False: All plants require the same photoperiod to flower.
True or False: Cytokinins promote cell division in plant roots and shoots.
True or False: Gibberellins can cause dwarf varieties of plants to grow taller.
