To accurately determine what the labels represent in the diagram showing the relationship between photosynthesis and cellular respiration, we can analyze the processes involved.
In photosynthesis, plants convert carbon dioxide and water into glucose and oxygen using sunlight. The overall equation can be summarized as:
- 6CO₂ (carbon dioxide) + 6H₂O (water) → C₆H₁₂O₆ (glucose) + 6O₂ (oxygen)
In cellular respiration, organisms break down glucose in the presence of oxygen to produce carbon dioxide, water, and energy. The equation for cellular respiration is:
- C₆H₁₂O₆ (glucose) + 6O₂ (oxygen) → 6CO₂ (carbon dioxide) + 6H₂O (water) + energy (ATP)
From the options provided, the relationship between the substances involved can help us determine the correct labels:
- If "1" corresponds to carbon dioxide and "2" corresponds to water, it would represent the reactants of photosynthesis.
- Conversely, if "1" corresponds to oxygen and "2" corresponds to carbon dioxide, it would represent the products of respiration.
Given the key components:
- 1-carbon dioxide; 2-water would indicate the inputs for photosynthesis.
- 1-Oxygen; 2-Carbon dioxide would indicate the outputs of cellular respiration.
Therefore, the most fitting answer based on the common relationship in the processes is:
1-carbon dioxide; 2-water.
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