Comparing bubble rates to determine maximum photosynthesis

Steps:

• Observe bubble counts per minute from each diagram for the aquatic plant under varying conditions like light or CO2.
• Identify the condition in diagram B that optimizes photosynthesis factors.
• Compare rates: B shows highest bubbles, indicating fastest oxygen production.
• Conclude B has the peak rate based on visual bubble density.

Why B is correct:

• Photosynthesis rate is measured by oxygen bubble output; B's optimal conditions (e.g., bright light, adequate CO2) maximize this per the light-dependent reaction formula: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂.

Why the others are wrong:

• A: Low light limits photon absorption, reducing bubble rate.
• C: Excessive temperature denatures enzymes, slowing photosynthesis.
• D: Insufficient CO₂ restricts carbon fixation, yielding fewer bubbles.

Final answer: B