SSC
BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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As the amount of carbon dioxide absorbed by the ocean rises, the pH of the sea surface water has decreased.
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The ocean absorbs water vapor, which decreases the amount of carbonate ions needed for coral reefs to survive.
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Methane absorbed by the ocean causes sea levels to decrease, which causes the pCO₂ of the ocean to decrease as well.
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Because the ocean absorbs 75% of carbon from the atmosphere, this abundance of carbonate ions will be harmful to ocean organisms.
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Detailed explanation-1: -Because of human-driven increased levels of carbon dioxide in the atmosphere, there is more CO2 dissolving into the ocean. The ocean’s average pH is now around 8.1, which is basic (or alkaline), but as the ocean continues to absorb more CO2, the pH decreases and the ocean becomes more acidic.
Detailed explanation-2: -However, as water temperature increases, its ability dissolve CO2 decreases.
Detailed explanation-3: -As Earth warms, water in the ocean soaks up energy (heat) and distributes it more evenly across the planet. The ocean also absorbs carbon dioxide from Earth’s atmosphere. The additional heat and carbon dioxide in the ocean can change the environment for the many plants and animals that live there.
Detailed explanation-4: -Carbon dioxide influences the pH of blood by reacting with water to form carbonic acid (H2CO3), which can dissociate to form a hydrogen ion (H+) and a hydrogen carbonate ion (HCO3-). Increasing the concentration of carbon dioxide in the blood therefore results in more H+ ions and a lower pH.