Multiple Choice
Which nutrients often limit the distribution and abundance of photosynthetic organisms?
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9. Photosynthesis
Introduction to Photosynthesis
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Which gas is produced during photosynthesis that directly benefits humans?
A
Oxygen ($O_2$)
B
Methane ($CH_4$)
C
Carbon dioxide ($CO_2$)
D
Nitrogen ($N_2$)
Verified step by step guidance1
Step 1: Recall the process of photosynthesis, which occurs in plants, algae, and some bacteria. During photosynthesis, light energy is converted into chemical energy, and the reactants are carbon dioxide ($CO_2$) and water ($H_2O$).
Step 2: Understand the chemical equation for photosynthesis: . This shows that oxygen ($O_2$) is a byproduct of photosynthesis.
Step 3: Recognize that oxygen ($O_2$) is essential for human survival because it is required for cellular respiration, the process by which cells generate energy.
Step 4: Eliminate the other options: Methane ($CH_4$) is not produced during photosynthesis, carbon dioxide ($CO_2$) is consumed rather than produced, and nitrogen ($N_2$) is not involved in the photosynthesis process.
Step 5: Conclude that the gas produced during photosynthesis that directly benefits humans is oxygen ($O_2$).
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