You have one hour to answer as many questions as you wish. The best 15 answers will be used to compute the grade for the exam. Please ask for an explanation of any question that in unclear. The limiting nutrient is the one that is depleted first.
Primary production is high at the equator because of upwelling.
It is lower in the subtropical oceans due to nutrient limitation that is caused by the permanent thermocline . At the mid-latitudes, there is a significant spring bloom before the seasonal pycnocline is formed and nutrients limited. At polar latitudes there is low production because of the low light levels and cool temperatures. Both are autotrophs and use photosynthesis. Protists are sincgle cells and Metaphyate are multicellular .