water

Question 1

What is a primary producer

Answer 1

an organism that uses light to synthesize new organic material from CO2

Question 2

What does the biological activity of an aquatic system depend

Answer 2

activities of the primary producers

Question 3

Name two types of primary producers and provide one example for each

Answer 3

oxygenic photoautotrophs such as algae and phytoplankton such as diatoms cyanobacteria dinoflagellates

Question 4

Name 3 groups of chemoheterotrophs who feed on primary producers

Answer 4

bacteria protozoa like zooplankton and fish

Question 5

Name three factors that affect the activities & net numbers of phytoplankton

Answer 5

temperature light received availability of specific limiting nutrients

Question 6

Name 2 limiting nutrients

Answer 6

nitrogen and phosphorus

Question 7

What do phytoplankton perform

Answer 7

photosynthesis

Question 8

Photic zone In clear water what is the maximum depth of penetration for lightand what is this zone referred as

Answer 8

300m photic zone