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Learn: Photosynthesis and Plant Adaptations
WJEC GCSE in BIOLOGY specification
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Welcome!Today we’ll explore photosynthesis and how plants adapt to carry out this process efficiently. Let’s dive in step by step!
What is Photosynthesis?Photosynthesis is the process by which plants produce their own food using light energy. It occurs in the chloroplasts of plant cells, where light energy is converted into chemical energy in the form of glucose.
Photosynthesis EquationThe word equation for photosynthesis is: Carbon dioxide + Water → Glucose + Oxygen. Light energy and chlorophyll are essential for this reaction to occur.
Quick check: What are the raw materials for photosynthesis?
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Why is Photosynthesis Important?Photosynthesis provides energy and food for plants and supports life on Earth by releasing oxygen into the atmosphere. Without photosynthesis, ecosystems could not sustain themselves.
Plant Adaptations for PhotosynthesisPlants have adapted special features to maximise photosynthesis. For example, leaves have a large surface area to absorb light, and stomata allow gas exchange needed for the process.
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Limiting Factors in PhotosynthesisPhotosynthesis can be limited by factors like light intensity, carbon dioxide concentration, and temperature. These factors affect the rate at which plants can produce glucose.
Which of the following are limiting factors for photosynthesis? (Select all that apply)
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Investigating PhotosynthesisExperiments can test factors affecting photosynthesis. For example, sodium hydroxide absorbs carbon dioxide, letting us observe its impact on photosynthesis rates.
During photosynthesis, carbon dioxide enters the plant through the {{blank0}}, and water is absorbed by the {{blank1}}.
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Review Time!Great work! You’ve learned about photosynthesis and how plants adapt to carry it out. Let’s recap with a few questions.
Which molecule is produced during photosynthesis and used for energy?
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Match the items on the left with their correct pairs on the right
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Which of these are products of photosynthesis? (Select all that apply)
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Well Done!You’ve completed the lesson on photosynthesis. Keep exploring the wonders of biology!
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