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Which of the following best describes why photosynthesis is essential for life on Earth?
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9. Photosynthesis
Introduction to Photosynthesis
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Which of the following best describes photosynthesis?
A
A process by which plants convert light energy into chemical energy in the form of glucose
B
A process by which animals break down food to release energy
C
A process by which fungi decompose organic matter
D
A process by which plants absorb nutrients from the soil
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Step 1: Begin by understanding the concept of photosynthesis. Photosynthesis is a biological process used by plants, algae, and some bacteria to convert light energy into chemical energy stored in glucose molecules.
Step 2: Recognize the key components involved in photosynthesis. These include light energy (usually from the sun), carbon dioxide (CO₂), and water (H₂O). The process occurs in the chloroplasts of plant cells, specifically within the thylakoid membranes.
Step 3: Recall the chemical equation for photosynthesis: . This equation shows that carbon dioxide and water are converted into glucose and oxygen using light energy.
Step 4: Compare the options provided in the question. Photosynthesis is specifically the process by which plants convert light energy into chemical energy in the form of glucose. The other options describe processes unrelated to photosynthesis, such as cellular respiration in animals, decomposition by fungi, and nutrient absorption by plants.
Step 5: Conclude that the correct description of photosynthesis is: 'A process by which plants convert light energy into chemical energy in the form of glucose.'
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