To determine which molecules could be represented by the circle labeled Z that is produced as an output of the mitochondria and required by the chloroplast, we need to consider the processes of cellular respiration and photosynthesis.
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Mitochondria:
- The mitochondria perform cellular respiration, which converts glucose and oxygen into carbon dioxide, water, and ATP (energy).
- Outputs: Carbon dioxide, Water, ATP, and Heat.
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Chloroplasts:
- Chloroplasts perform photosynthesis, which converts carbon dioxide and water into glucose and oxygen, using sunlight as energy.
- Inputs: Carbon dioxide, Water, Light energy.
- Outputs: Glucose and Oxygen.
Now, let’s analyze the options for what Z might represent:
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Carbon Dioxide:
- Produced in cellular respiration (from mitochondria) → Yes.
- Required in photosynthesis (by chloroplast) → Yes.
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Water:
- Produced in cellular respiration (from mitochondria) → Yes.
- Required in photosynthesis (by chloroplast) → Yes.
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Glucose:
- Produced in photosynthesis (by chloroplast) → No.
- Required in cellular respiration (by mitochondria) → Yes.
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Oxygen:
- Produced in cellular respiration (from mitochondria) → No.
- Required in cellular respiration as a reactant → Yes. (But not produced.)
Based on this analysis, the answers for which molecule(s) could be represented by Z are:
- Carbon Dioxide
- Water
So, the correct selections would be:
- Letter Z could be carbon dioxide because it is produced in cellular respiration and is a reactant of photosynthesis.
- Letter Z could be a water molecule because it is produced in cellular respiration and is a reactant of photosynthesis.
(Note: The option regarding water being produced in photosynthesis is incorrect, as well as oxygen being a product of cellular respiration but not required by chloroplasts.)