Consider the following statements about dead zones in water bodies 1 It is a phase when a water body...........

Geography World - Water Bodies

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Consider the following statements about dead zones in water bodies

1.It is a phase when a water body lacks nutrients like Nitrogen.

2.In these areas growth of cyanobacteria goes out of control.

3.Dead zones are mostly found in the middle of the ocean away from the coast.

Which of the statements given above is/are correct?

2 only

1 and 2 only

1 and 3 only

None of the above

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Explanation:

2 only

Statement 1 is incorrect. Dead zones are often characterized by excess nutrients, particularly nitrogen and phosphorus, leading to excessive growth of algae.

Statement 2 is correct. In dead zones, the overgrowth of algae, including cyanobacteria, occurs due to nutrient pollution.

Statement 3 is incorrect. Dead zones are often found near the coast rather than in the middle of the ocean. They are typically associated with human activities and nutrient runoff from land.