BIOLOGY-Plant Water Relations Questions and Answers
Plant Water Relations questions with answers cover essential biology concepts such as osmosis, transpiration, and water potential in plants. These biology questions and answers are commonly asked in NEET, AIIMS, and medical entrance exams, helping students understand how plants absorb, transport, and utilize water efficiently. Practicing these MCQs enhances conceptual clarity about plant physiology and cellular mechanisms. Students can download biology PDFs and attempt online quizzes to improve accuracy and recall for competitive medical exams.
BIOLOGY-Plant Water Relations
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50 questions
11. What is the main function of root hairs in water absorption?
- Increase surface area
- Store water
- Produce hormones
- Anchor plant firmly
12. Which ion plays a key role in stomatal opening?
- Potassium
- Calcium
- Sodium
- Magnesium
13. What is guttation?
- Water exudation from leaf tips
- Water loss through stomata
- Water absorption by roots
- Water movement in xylem
14. Which structure prevents air bubbles from entering the xylem?
- Casparian strip
- Cuticle
- Epidermis
- Pericycle
16. Which plant adaptation reduces transpiration in arid environments?
- Sunken stomata
- Broad leaves
- Thin cuticle
- Many stomata
17. What is the term for the pressure developed in roots that pushes water upward?
- Root pressure
- Transpiration pull
- Capillary force
- Imbibition
18. Which process describes water movement through living cytoplasm via plasmodesmata?
- Symplast pathway
- Apoplast pathway
- Transcellular pathway
- Vascular pathway
19. What happens to a plant cell when placed in a hypotonic solution?
- Becomes turgid
- Undergoes plasmolysis
- Shrinks
- Loses water
20. Which element is essential for maintaining stomatal function?
- Calcium
- Iron
- Zinc
- Copper