Why are upwelling zones generally more productive than coastal ...

[faduma]

Why are upwelling zones generally more productive than coastal oceans?
 
  What will be an ideal response?

Question 2

Judge the following sentence according to the criteria given below: Areas that have the greatest biomass have the lowest water temperatures BECAUSE cold water occurs at higher latitudes than warm water.
 
  A) The assertion and the reason are both correct, and the reason is valid.
  B) The assertion and the reason are both correct, but the reason is invalid.
  C) The assertion is correct, but the reason is incorrect.
  D) The assertion is incorrect, but the reason is correct.
  E) Both the assertion and the reason are incorrect.

[morrie123456]

Answer to Question 1

Coastal oceans are shallow in comparison to the open ocean with a higher proportion of the water column and higher nutrient inputs coming from terrestrial run-off. However, there is more turbidity in coastal waters, which limits the depth reached by solar radiation. Remembering that sunlight and nutrients are necessary for photosynthesis, upwelling brings cold, nutrient-rich waters up from depth to the surface. Colder water holds more oxygen than warmer waters. Upwelling zones provide nutrients which stimulate photosynthesis. The total area of upwelling zones is relatively small but per unit area; upwelling zones fix more organic carbon than any other ocean zone.

Answer to Question 2

B

[faduma]

Thanks

[morrie123456]

Welcome