Plant Physiology
Biology ⇒ Plant Biology
Plant Physiology starts at 9 and continues till grade 12.
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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.
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.
Which of the following best describes photoperiodism?
(1) Growth response to gravity
(2) Growth response to light direction
(3) Response to the relative lengths of day and night
(4) Response to temperature changes
Which of the following best describes the function of the apoplast pathway?
(1) Movement of water through cytoplasm
(2) Movement of water through cell walls and intercellular spaces
(3) Movement of water through vacuoles
(4) Movement of water through plasmodesmata
Which of the following is a characteristic feature of CAM plants?
(1) Stomata open during the day
(2) CO₂ fixation occurs at night
(3) High rates of photorespiration
(4) No use of malic acid
Which of the following is a direct product of the Calvin cycle?
(1) Glucose
(2) ATP
(3) NADPH
(4) Glyceraldehyde-3-phosphate (G3P)
Fill in the blank: The loss of water vapor from aerial parts of a plant is called _______.
Fill in the blank: The movement of water across a semipermeable membrane from a region of low solute concentration to high solute concentration is called _______.
Fill in the blank: The opening and closing of stomata are controlled by _______ cells.
Fill in the blank: The process by which plants convert light energy into chemical energy is called _______.
True or False: CAM plants open their stomata during the day to minimize water loss.
True or False: Guttation is the loss of water in the form of vapor from the aerial parts of plants.
True or False: Photorespiration increases the efficiency of photosynthesis in C3 plants.
True or False: The light-dependent reactions of photosynthesis occur in the stroma of the chloroplast.
