The given diagram represents guard cells of stomata in two different conditions.Which of the following options is TRUE about conditions I and II in guard cells?
Correct answer: C. Condition I indicates turgid guard cells with an open stomatal pore, while Condition II shows flaccid guard cells with a closed stomatal pore
- A. Condition I shows guard cells in a turgid state, leading to a closed stomatal pore
- B. Condition II represents flaccid guard cells, resulting in an open stomatal pore
- C. Condition I indicates turgid guard cells with an open stomatal pore, while Condition II shows flaccid guard cells with a closed stomatal pore
- D. Both conditions show guard cells in the same state, impacting stomatal opening similarly
Explanation
The correct answer is Option C.In Condition I, the guard cells are turgid, meaning they are swollen due to water intake, which causes the stomatal pore to open. This condition is typical during the day when photosynthesis is active.In Condition II, the guard cells are flaccid, indicating water loss, causing the stomatal pore to close. This usually occurs at night or during water stress conditions to conserve water.
Last updated
About Plant Nutrition and Transport
Plants require macronutrients and micronutrients for growth, and mineral deficiencies produce recognizable symptoms. Transport involves water and minerals through xylem by transpiration pull, cohesion and adhesion, while phloem translocates sugars from sources to sinks. Root pressure and transpiration are distinct mechanisms.
Practise Forms and Functions of Plants
272 free Forms and Functions of Plants MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Biology questions like this
Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
Consider the given molecules.I.NADPHII. ATPIII. CO2In the process of photosynthesis, these molecules are used as inputs in the:
Insectivorous plants are autotrophs which grow in the soil that is deficient in
One of the characteristics of lenticels in woody plants is that they:
In plants, the option that shows the range of environmental temperature and CO2 to O2 ratio which favours photorespiration is:
The pathway through which water moves from root hair cells to the xylem in plants are/is:I. apoplastII. symplastIII. vacuolar