Chapter-Chapter 10. Life Processes in Plants Science Curiosity class 7 in english Medium CBSE Notes

Chapter 10: Life Processes in Plants

Definitions:

Photosynthesis: Photosynthesis is the process by which green plants prepare their food using sunlight, carbon dioxide, and water in the presence of chlorophyll.

Autotroph: Autotrophs are organisms that can prepare their own food.

Chlorophyll: Chlorophyll is the green pigment in plants that helps in photosynthesis.

Stomata: Stomata are tiny openings on the surface of leaves that help in gas exchange.

Respiration: Respiration is the process of breaking down food to release energy.

Transpiration: Transpiration is the process of loss of water vapour from the leaves.

Xylem: Xylem is the tissue that transports water and minerals from roots to other parts of the plant.

Phloem: Phloem is the tissue that transports food from leaves to other parts of the plant.

Excretion: Excretion is the process of removing waste materials from the plant.

Germination: Germination is the process by which a seed grows into a new plant.

Quick Revision Points:

• Plants prepare food by photosynthesis.
• Sunlight, water, CO₂, and chlorophyll are required.
• Plants are autotrophs.
• Stomata help in gas exchange.
• Respiration occurs day and night.
• Xylem transports water and minerals.
• Phloem transports food.
• Transpiration helps in cooling and water movement.
• Plants remove waste without special organs.
• Plants maintain balance in nature.

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