Life Processes in Plants

Notes Mock-Test

Learning Objectives

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Learning Objectives

Understand the process of photosynthesis and its importance in nature.
Explain the role of respiration in plants and how it interacts with photosynthesis.
Design experiments to observe water transportation in plants under different conditions.
Identify the structures involved in gas exchange in plants, such as stomata.
Analyze the effects of light and water availability on plant growth and starch production.
Discuss the contributions of scientists like Kamala Sohonie to plant biology.

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Revision Notes & Summary

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Notes on Photosynthesis and Respiration

Comparison of Photosynthesis and Respiration

S.No.	Feature	Photosynthesis	Respiration
1.	Raw materials
2.	Products
3.	Word equation
4.	Importance

Experiment on Stomata

Materials Needed:
- Leaf from a plant (e.g., rhoeo, money plant, onion, hibiscus, coleus, or grass)
- Beaker filled with water
- Microscope slide
- Watch glass with water
- Dropper with ink
Procedure:
1. Collect a leaf and place it in a beaker filled with water.
2. Peel a thin layer from the lower surface of the leaf.
3. Transfer the peel to a watch glass with water.
4. Place a drop of water on a microscope slide.
5. Using forceps, transfer the leaf peel to the slide.
6. Add a drop of ink on the leaf peel.
7. Cover with a coverslip and observe under a microscope.
Observation:
- Stomata on the lower surface of a rhoeo leaf are visible.

Experimental Setup for Water Transport

Experiment to Check Water Transportation in Plants

Materials:
- Potted plant (Destarched plant)
- Sodium hydroxide solution
- Inverted glass jar
Observation:
- The setup isolates the plant to observe gas exchange.

Transport of Water and Minerals

Water Transport through Xylem:
- Represented with blue arrows showing upward movement from roots to leaves.
Food Transport through Phloem:
- Represented with red arrows showing downward and lateral movement from leaves to other parts of the plant.

Iodine Test for Starch Presence

S.No.	Light conditions for potted plant	Initial colours before iodine test	Final colours after iodine test
1.	Plant kept in sunlight	Green and non-green patches	Blue-black
2.	Plant kept in the dark	Green and non-green patches	No change in colour

Conclusion:
- Presence of blue-black colour indicates starch production in sunlight.
- No change in dark conditions indicates no starch production.

Know a Scientist

Kamala Sohonie (1911-1998):
- Notable Indian scientist who contributed to the study of respiration in plants.
- Worked at Lady Hardinge Medical College and Royal Institute of Science, Bombay.
- Improved nutritive values of plant foods and studied coconut sap as a drink.

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Practice Test – MCQs, True/False

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Life Processes in Plants

Learning Objectives

Learning Objectives

Practice, Analyze & Improve 🚀

Revision Notes & Summary

Notes on Photosynthesis and Respiration

Comparison of Photosynthesis and Respiration

Experiment on Stomata

Experimental Setup for Water Transport

Experiment to Check Water Transportation in Plants

Transport of Water and Minerals

Iodine Test for Starch Presence

Know a Scientist

Do you belong in the Top 10%?

Practice Test – MCQs, True/False