Q1. Which process is primarily responsible for the movement of water in plants? (2020)
Solution:
Transpiration creates a negative pressure in the leaves, which helps in the upward movement of water through the xylem.
⏱ Time: 0s
Q2. What is the term for the movement of water across a semi-permeable membrane?
Solution:
Osmosis is the movement of water across a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration.
⏱ Time: 0s
Q3. Which structure in the leaf is primarily responsible for gas exchange?
Solution:
Stomata are small openings on the leaf surface that allow for gas exchange, including the intake of carbon dioxide and the release of oxygen.
⏱ Time: 0s
Q4. Which of the following is a mechanism of water transport in plants?
Solution:
All of the above mechanisms (cohesion, adhesion, and capillarity) contribute to water transport in plants.
⏱ Time: 0s
Q5. In which part of the plant does most of the photosynthesis occur?
Solution:
Most of the photosynthesis occurs in the leaves, where chloroplasts are abundant.
⏱ Time: 0s
Q6. Which of the following is NOT a type of transport in plants?
Solution:
Electrolysis is not a type of transport in plants; it is a chemical process involving the decomposition of substances.
⏱ Time: 0s
Q7. What is the primary factor that affects the rate of photosynthesis in relation to water transport?
Solution:
Water availability is crucial for photosynthesis, as it is a raw material needed for the process.
⏱ Time: 0s
Q8. Which hormone is primarily involved in the regulation of water loss in plants? (2023)
Solution:
Abscisic acid plays a crucial role in regulating water loss by causing stomatal closure during water stress.
⏱ Time: 0s
Q9. What is the main driving force for the movement of water in plants? (2023)
Solution:
Transpiration pull, created by the evaporation of water from the leaves, is the main driving force for water movement in plants.
⏱ Time: 0s
Q10. Which structure in the plant regulates the opening and closing of stomata?
Solution:
Guard cells surround the stomata and control their opening and closing, regulating gas exchange and transpiration.
