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Which one of the following reasons best explains why these regions are marine deserts? These regions are positioned under the atmospheric subtropical highs, thus there are no winds, there are no strong surface currents, and the surface waters are saltier because of strong evaporation. These regions are positioned in the tropical Intertropical Convergence Zone, thus there are no winds, there are no strong surface currents, and the surface ocean water is too warm to support much life. The very strong oceanic upwelling in these regions bring up very cold water that is CO2-rich and thus acidic. These conditions are not suitable for life. Very high nutrient levels in these regions cause 'dead zones' where only toxic algal blooms thrive.

Which one of the following reasons best explains why these regions are marine deserts? These regions are positioned under the atmospheric subtropical highs, thus there are no winds, there are no strong surface currents, and the surface waters are saltier because of strong evaporation. These regions are positioned in the tropical Intertropical Convergence Zone, thus there are no winds, there are no strong surface currents, and the surface ocean water is too warm to support much life. The very strong oceanic upwelling in these regions bring up very cold water that is CO2-rich and thus acidic. These conditions are not suitable for life. Very high nutrient levels in these regions cause 'dead zones' where only toxic algal blooms thrive.

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
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the 3rd option is wrong 

**Question:** Which one of the following reasons best explains why these regions are marine deserts? 1. These regions are positioned under the atmospheric subtropical highs, thus there are no winds, there are no strong surface currents, and the surface waters are saltier because of strong evaporation. 2. These regions are positioned in the tropical Intertropical Convergence Zone, thus there are no winds, there are no strong surface currents, and the surface ocean water is too warm to support much life. 3. The very strong oceanic upwelling in these regions bring up very cold water that is CO2-rich and thus acidic. These conditions are not suitable for life. 4. Very high nutrient levels in these regions cause ‘dead zones’ where only toxic algal blooms thrive. **Correct Answer:** The very strong oceanic upwelling in these regions bring up very cold water that is CO2-rich and thus acidic. These conditions are not suitable for life.
Transcribed Image Text:**Question:** Which one of the following reasons best explains why these regions are marine deserts? 1. These regions are positioned under the atmospheric subtropical highs, thus there are no winds, there are no strong surface currents, and the surface waters are saltier because of strong evaporation. 2. These regions are positioned in the tropical Intertropical Convergence Zone, thus there are no winds, there are no strong surface currents, and the surface ocean water is too warm to support much life. 3. The very strong oceanic upwelling in these regions bring up very cold water that is CO2-rich and thus acidic. These conditions are not suitable for life. 4. Very high nutrient levels in these regions cause ‘dead zones’ where only toxic algal blooms thrive. **Correct Answer:** The very strong oceanic upwelling in these regions bring up very cold water that is CO2-rich and thus acidic. These conditions are not suitable for life.
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Step 1 Answer

The reason which best explains the marine desert is 

Very high nutrients levels in these regions cause 'dead zones' where only toxic algal bloom thrive.

Ocean desert is also called as the dead zone whet the some part of ocean which does not support life.

In this region we have less oxygen  and refered to as a dead zone. 

Because here present most of the marine life either dies or they leave(if movable life fish) thus we get here a biological desert. 

 

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