Question

Choose the correct option from the following.

• A. Only statements 2 and 3 are correct.
• B. None of the statements are correct.
• C. All of the statements are correct.
• D. Only statement 1 is correct.

Answer 1

The correct option is D Only statement 1 is correct.

• The opening and closing of stomatal pores are regulated by guard cells by increasing or decreasing the amount of water in them. Hence statement 1 is correct
• Cells lose water or shrink when placed in a hypertonic solution. Cells gain water or swell when placed in a hypotonic solution. Cells neither lose water nor gain when placed in an isotonic solution. Hence statements 2 and 3 are incorrect.