78. Zooplankton that are herbivores feed primarily on: a. fish b. phytoplankton

Question

78. Zooplankton that are herbivores feed primarily on: a. fish b. phytoplankton e. dead organic matter d. other zooplankton Wher 79. Group the organisms in the order of highest to lowest abundance in the ocean's euphotic zone a. viruses, phytoplankton, bacteria, zooplankton b. bacteria, phytoplankton, zooplankton, viruses c. phytoplankton, bacteria, viruses, zooplankton d. bacteria, viruses, zooplankton, phytoplankton e. viruses, bacteria, phytoplankton, zooplankton 80. If tuna are at a trophic level of 4, how many kilograms of phytoplankton does it take to make I kg of una a. 10 b. 100 c. 1,000 d. 10,000 e. 100,000 61. 81. What limits productivity in the bathypelagic, abyssopelagic, and deep sea floor! a. low light b. high pressure c. low temperature d. the supply of organic matter e nutrient concentrations

Explanation / Answer

78. b.  phytoplankton.  

79. e. viruses, bacteria, phytoplankton and zooplankton.

80. c. 1000 Kg. assuming efficiency of 10%. Thus 1 kg tuna X 10 kg first level X 10 kg Herbivorous consumers x 10 kg phytoplankton= 1000

81. d. supply of organic matter

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