Why is photosynthesis inhibited at the very top layer of the ocean surface?
a. The salinity is too high.
b. There is too much light.
c. Oxygen is too low.
d. Oxygen is too high.
e. There are too many plankton in the water.
Question 2Upwelling and iron (suspended in glacial runoff) make these waters among the most productive on Earth.
a. Mediterranean Sea
b. Baltic Sea
c. North Atlantic
d. Arctic Ocean
e. Antarctic Ocean