Plant Physiology - Transport in Plants

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Q1. What is the term for the movement of water through a plant from roots to leaves?

Solution:

Translocation refers to the movement of water and nutrients through the plant, specifically from roots to leaves.

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Q2. Which of the following is NOT a method of water transport in plants?

Solution:

Photosynthesis is a process that converts light energy into chemical energy, not a method of water transport.

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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.

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Q4. In which part of the plant does the majority of photosynthesis occur?

Solution:

Leaves are the primary site of photosynthesis due to the presence of chlorophyll in chloroplasts.

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Q5. Which structure in the plant is primarily responsible for the uptake of water?

Solution:

Roots are primarily responsible for the uptake of water and minerals from the soil.

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Q6. 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.

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Q7. In which part of the plant does most transpiration occur?

Solution:

Most transpiration occurs in the leaves, where stomata are located to facilitate gas exchange and water loss.

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Q8. 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.

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Q9. 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.

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Q10. 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.