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Photosynthesis and cellular respiration have a unique relationship in that the products of one are the reactants of the other. Evaluate the model provided. The reactants and products are missing from the diagram. Select ALL of the answers below that correctly pair the letter on the diagram with the product or reactant. Responses A D is ATP.D is ATP. B A is sunlight.A is sunlight. C B is H2O. B is H 2 O. D F is CO2 + H2O.F is CO 2 + H 2 O. E C is CO2 + C6H12O6.

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To evaluate the relationship between photosynthesis and cellular respiration, it's important to understand their overall equations:

  1. Photosynthesis: \[ 6 CO_2 + 6 H_2O + light \ energy \rightarrow C_6H_{12}O_6 + 6 O_2 \]

    • Reactants: Carbon dioxide (CO2), water (H2O), and sunlight
    • Products: Glucose (C6H12O6) and oxygen (O2)

  2. Cellular Respiration: \[ C_6H_{12}O_6 + 6 O_2 \rightarrow 6 CO_2 + 6 H_2O + ATP \]

    • Reactants: Glucose (C6H12O6) and oxygen (O2)
    • Products: Carbon dioxide (CO2), water (H2O), and ATP

From this, we can see the following pairings based on the relationship between the reactants and products:

  • Reactants of photosynthesis:

    • A: sunlight (for photosynthesis)
    • B: H2O (water)
    • D: CO2 (carbon dioxide)

  • Products of photosynthesis:

    • C: C6H12O6 (glucose)
    • F: O2 (oxygen)

  • Reactants of cellular respiration:

    • C: C6H12O6 (glucose)
    • F: O2 (oxygen)

  • Products of cellular respiration:

    • D: ATP (energy)
    • B: H2O (water)
    • D: CO2 (carbon dioxide)

Based on this information, the following selections accurately match the letters with their respective products or reactants:

  • A is sunlight. (correct)
  • B is H2O. (correct)
  • D is ATP. (correct as a product of cellular respiration)
  • F is CO2 + H2O. (False; F should represent O2 as a product of photosynthesis)
  • C is CO2 + C6H12O6. (False; C should represent glucose)

Based on your question, the correct responses that pair the letter with the product or reactant are:

  • A is sunlight. (Correct)
  • B is H2O. (Correct)
  • D is ATP. (Correct)

Thus, the correct choices are A, B, and D.