Q. Consider the following statements regarding the Black Sea:
1.The deep waters of the Black Sea are anoxic, meaning they contain virtually no dissolved oxygen.
2.It has a higher salinity than the open global oceans due to its enclosed nature and high evaporation rates.
3.The countries bordering the Black Sea include Bulgaria, Romania, Ukraine, Russia, Georgia, and Turkey.
Which of the statements given above is/are correct?
Answer: B
Notes:
Explanation:
- Statement 1 is correct: The Black Sea is recognized as the world’s largest meromictic basin. The absence of vertical mixing between surface and deeper layers makes the deep waters permanently anoxic.
- Statement 2 is incorrect: Contrary to popular belief, the Black Sea has lower salinity than the global oceans. This is because it receives massive volumes of freshwater inflow from major rivers (like the Danube and Dnieper) and has a restricted exchange of water with the saltier Mediterranean.
- Statement 3 is correct: The Black Sea is bordered by exactly six countries: Bulgaria, Romania, Ukraine, Russia, Georgia, and Turkey.
