2. Plant Physiology
The chapter explores plant physiology, highlighting key processes such as the absorption of water and minerals, ascending sap, transpiration, photosynthesis, chemical coordination through hormones, and tropic movements. It delves into the mechanisms driving these processes and their significance in plant growth and development.
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Sections
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What we have learnt
- Plants absorb water and minerals through roots using various mechanisms such as osmosis and diffusion.
- Transpiration plays a crucial role in water movement and temperature regulation in plants.
- Photosynthesis is essential for energy production in plants and contributes to the Earth's oxygen supply.
Key Concepts
- -- Imbibition
- The initial absorption of water by dry tissues, leading to the swelling of cells.
- -- Transpiration Pull
- The negative pressure created by evaporation of water from leaves, pulling more water up from roots through the xylem.
- -- Photosynthesis
- The process by which plants convert light energy into chemical energy stored in glucose, crucial for growth and metabolic processes.
- -- Plant Hormones
- Chemical signals like auxins and gibberellins that regulate growth and responses to environmental stimuli in plants.
- -- Tropic Movements
- Directional growth responses of plants to external stimuli such as light (phototropism) or gravity (gravitropism).
Additional Learning Materials
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