A) Multicellular.
B) Their name derives from "first animals".
C) Some are heterotrophs.
D) Are included among the Protista.
E) Some are autotrophs.
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A) On the surface of planktonic organisms.
B) Inside primary producers.
C) Inside animals.
D) On the surface of animals.
E) Within decay organisms.
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A) Mass reproduction of algal cells.
B) Mass death of algal cells.
C) Mass feeding on algal cells by zooplankton.
D) Mass vertical migrations of algal cells.
E) Mass horizontal migrations of algal cells.
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A) Diatoms.
B) Dinoflagellates.
C) Radiolarians.
D) Foraminiferans.
E) Lichens.
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A) Dinoflagellates
B) Cyanobacteria
C) Diatoms
D) Foraminiferans
E) Ciliates
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A) Marine lichens
B) Diatoms
C) Archaea
D) Radiolarians
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A) Decomposers.
B) Found only in the plankton.
C) Having a glass-like skeleton.
D) Protists.
E) Photosynthetic.
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A) Break down waste products and dead organic matter
B) Carry out photosynthesis
C) Are heterotrophs
D) Are particularly abundant in bottom sediments
E) Ensure the recycling of essential nutrients
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A) Heterotrophs.
B) Planktonic.
C) Multicellular.
D) Red in color.
E) Prokaryotic.
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A) Floatation
B) Hunting
C) Photosynthesis
D) Reproduction
E) Restore normal size
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