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.
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 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.
Describe the process of secondary growth in dicot stems.
Describe the role of meristems in plant growth.
Describe the role of the pericycle in root development.
Explain how phototropism occurs in plants.
Explain the difference between primary and secondary growth in plants.
Explain the role of ethylene in plant growth and development.
Explain the role of light in seed germination for photoblastic seeds.
Explain the significance of photoperiodism in agriculture.
Explain why water is essential for seed germination.
What is the main function of the vascular cambium in plants?
A plant is genetically modified to overexpress the gene encoding for DELLA proteins. Predict and explain the effect on its growth and development.
A researcher applies gibberellin to a genetically dwarf pea plant and observes that the plant attains normal height. What does this suggest about the nature of the dwarfism in this plant?
A scientist measures the rate of cell division in the root apical meristem of two plant species. Species A has a cell cycle duration of 12 hours, while Species B has a cell cycle duration of 24 hours. If both species start with 100 cells, how many cells will each have after 48 hours, assuming no cell death and synchronous division?
Describe the molecular mechanism by which phytochrome regulates flowering in short-day and long-day plants.
Explain how the balance between auxin and cytokinin concentrations influences organogenesis in plant tissue culture.
Explain the role of expansins in plant cell growth and how their activity is regulated.
