Multiple choice

Which of the following statements is incorrect?

  1. Iron-rich dust influx from large desert can cause red tides.

  2. Coastal water pollution can cause red tides.

  3. The occurrence of red tides may be natural or from human activities.

  4. When the algae are present in high concentrations, the water appears to be discolored.

  5. Red tides are related to the movements of the tides.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Red tides are unrelated to movements of the tides.They are not necessarily red and many have no discoloration at all.

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