[Campbell Biology P.102] Based on the information provided regarding ocean acidification, wh... | Practice Question
Based on the information provided regarding ocean acidification, which of the following statements is accurate?
A: Humans have been responsible for 50% of atmospheric CO2 absorption by oceans.
B: The pH of the oceans has decreased by 0.3-0.5 pH unit over the past 420,000 years.
C: Ocean acidification is expected to reduce the carbonate ion concentration by 40% by the year 2100.
D: Carbonate ions are crucial for photosynthesis in marine plants, not for calcification.
Explanation
The paragraph "As seawater acidifies..." explicitly states: "Scientists predict that ocean acidification will cause the carbonate ion concentration to decrease by 40% by the year 2100."