Plant Physiology
Biology ⇒ Plant Biology
Plant Physiology starts at 9 and continues till grade 12.
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See sample questions for grade 12
A plant cell is placed in a hypertonic solution. Predict and explain what will happen to the cell.
A plant is exposed to continuous red light. Predict the effect on its flowering if it is a short-day plant.
A plant is exposed to high concentrations of ethylene. What physiological response is most likely to occur?
A plant is placed in an environment with low light intensity. Predict the effect on its rate of photosynthesis.
Describe the role of phytochrome in plant development.
Describe the role of potassium ions in the opening and closing of stomata.
Describe the role of stomata in plant physiology.
Explain how abscisic acid (ABA) helps plants survive drought conditions.
Explain the difference between C3 and C4 photosynthetic pathways.
Explain the difference between symplastic and apoplastic pathways of water movement in plants.
Explain the role of magnesium in plant physiology.
Explain the significance of the Casparian strip in plant roots.
What is the main function of root hairs in plants?
A plant is exposed to a sudden increase in salinity in the soil. Explain the physiological challenges the plant faces and one adaptation it might use to survive.
A plant is genetically modified to lack functional aquaporins in its root cells. Predict and explain the effect on water uptake and overall plant physiology.
A researcher measures the rate of photosynthesis in a plant at different concentrations of carbon dioxide. The rate increases with CO2 concentration up to a point, then levels off. Explain the physiological reason for this observation.
Describe how the cohesion-tension theory explains the ascent of sap in tall trees, and discuss one experimental evidence supporting this theory.
Describe the process of pressure potential and its role in the movement of water between plant cells.
Explain how the process of phototropism occurs at the cellular level in response to unilateral light.
