Nektons are: Ecology and General Silviculture Mcqs July 10, 2019 BILAL KHATTAK0 A.Organisms that swim in water B.Floating plants C.Suspended lower plants D.Animals associated with plants E.Algae Related Mcqs: What is Plankton? Oxygen present in the atmosphere has been formed by: An example of an abiotic component is __________? The source of energy in an ecosystem is __________? Red Data Book Provides data on ___________. The greatest biomass of autotrophs in the world’s oceans is that of: Hydrilla is a:? Fungi is/are __________? Trophic levels are formed by: Trophic levels are formed by ____________.