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
1. What is the process by which plants lose water vapor through their leaves?
- Transpiration
- Respiration
- Photosynthesis
- Osmosis
2. Which tissue is responsible for transporting water and minerals from roots to leaves in plants?
- Xylem
- Phloem
- Cambium
- Epidermis
3. What is the main driving force for water movement in the xylem?
- Transpiration pull
- Root pressure
- Capillary action
- Gravity
4. Which process involves the movement of water across a semi-permeable membrane?
- Osmosis
- Diffusion
- Active transport
- Plasmolysis
5. What is the term for the shrinking of plant cell cytoplasm away from the cell wall due to water loss?
- Plasmolysis
- Cytolysis
- Deplasmolysis
- Hemolysis
6. Which cells control the opening and closing of stomata?
- Guard cells
- Epidermal cells
- Mesophyll cells
- Companion cells
7. What is the cohesion-tension theory primarily concerned with?
- Water transport in xylem
- Sugar transport in phloem
- Mineral absorption
- Stomatal regulation
8. Which factor does NOT increase the rate of transpiration?
- High humidity
- High temperature
- Wind
- Light intensity
9. What is the term for the attraction between water molecules?
- Cohesion
- Adhesion
- Surface tension
- Capillarity
10. Which process describes water movement from root epidermis to xylem?
- Apoplast pathway
- Symplast pathway
- Transmembrane pathway
- Vacuolar pathway