Answer to Question 1ANS: A
The upwelling of deep water returns nonconservative nutrients to surface waters. Information can be
found in the section Lack of Nutrients and Light can limit Primary Productivity.
Answer to Question 2ANS: B
Satellites have made sensing the chlorophyll content of the ocean possible. The amount of chlorophyll
is directly related to photosynthesis. Information can be found in the section Measuring Primary
Productivity.