Plant Physiology
Biology ⇒ Plant Biology
Plant Physiology starts at 9 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Plant Physiology.
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 10
A plant is placed in a sealed container with only sunlight and water provided. After several hours, the oxygen level in the container increases. What process is responsible for this change?
Define transpiration.
Describe the process of phototropism in plants.
Describe the role of minerals in plant physiology.
A plant is placed in a sealed container with only sunlight and water provided. After several hours, the oxygen level in the container increases. What process is responsible for this change?
A plant is exposed to green light only. Predict and explain the effect on its rate of photosynthesis.
A plant is supplied with water containing radioactive oxygen (O-18). After photosynthesis, in which product will the radioactive oxygen be found?
(1) Glucose
(2) Oxygen gas
(3) Carbon dioxide
(4) ATP
A scientist measures the rate of transpiration in two identical plants. One plant is placed in a humid environment, and the other in a dry environment. Predict which plant will have a higher rate of transpiration and explain why.
Which gas is taken in by plants during photosynthesis?
(1) Oxygen
(2) Nitrogen
(3) Carbon dioxide
(4) Hydrogen
Which of the following best describes active transport in plants?
(1) Movement of substances from high to low concentration without energy
(2) Movement of substances from low to high concentration using energy
(3) Movement of water through osmosis
(4) Movement of gases through diffusion
Which of the following best describes the process of osmosis?
(1) Movement of water from high to low concentration through a semi-permeable membrane
(2) Movement of minerals from low to high concentration
(3) Movement of gases through stomata
(4) Movement of food through phloem
Which of the following best explains why plants close their stomata during hot, dry conditions?
(1) To increase photosynthesis
(2) To reduce water loss
(3) To absorb more carbon dioxide
(4) To increase transpiration
Fill in the blank: The main site of photosynthesis in a leaf is the __________ mesophyll.
Fill in the blank: The movement of water through the plant from roots to leaves is called the __________ stream.
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: All plant cells contain chloroplasts.
True or False: Guttation is the loss of water in the form of vapor from the plant.
True or False: Phloem transports only sugars in plants.
True or False: Photosynthesis occurs only in the leaves of plants.
