A An ecosystem, a unit of the ^biosphere, derives its energy ^from the sun. ^A) True B) False ^B All the organisms that live ^together in an ecosystem are ^called a biotic: ^A) Population B) Community ^A A(n) ______ is a group of ^similar organisms within a ^biotic community. ^A) Population B) Ecosystem ^A A population is to a community^as tissues are to an _______. ^A) Organ B) Organism ^ ^A Three important aspects of ^a biotic community are sun- ^light, nutrients and: ^A) Temperature B) Food ^B A bass eating algae and ^minnows is an example of a(n) ^_______. A) Carnivore ^B) Omnivore ^A Bacteria and fungi are a ^lake's decomposers. ^A) True B) False ^ ^B As energy is passed from ^one trophic level to ^another, it ________. ^A) Increases B) Decreases ^A The transfer of the sun's ^energy through many organisms ^is a(n) ________. ^A) Food Chain B) Herbivore ^B The relationship between ^the remora and a shark is an ^example of _______. ^A) Mutualism B) Commensalism ^ ^ ^ ^ ^
