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Marine Biology Mod 3 Vocab: The First Four Kingdoms

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Question
Answer
Bacteria   Prokaryotic, single-celled, microscopic organisms  
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Decomposers   Organisms that break down dead organic matter into smaller molecules  
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Chemosynthesis   The making of organic material from inorganic substances using chemical energy  
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Phytoplankton   Photosynthetic organisms that drift in the water  
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Zooplankton   Tiny floating organisms that are either small animals or protozoa  
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Thallus   The complete body of an alga, not differentiated into true leaves, stems, or roots  
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Diploid   A cell that has chromosomes which come in pairs  
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Haploid   A cell that contains half the normal number of chromosomes (one from each pair)  
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Alternation of generations   A life cycle that alternates between a sexual stage (gametophyte) and an asexual stage (sporophyte)  
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Symbiosis   A close relationship between two species where at least one benefits  
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Lichen   An organism that results from the symbiosis between a fungus and an alga  
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