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Diatomaceous earth - answer✔a light soil consisting of siliceous diatom remains and often used
as a filtering material
Hypotheca - answer✔the smaller portion of a diatom frustule
Epitheca - answer✔the larger portion of a diatom frustule
Dinoflagellate - answer✔plantlike protist; half are photosynthetic and half are heterotrophs,
have 2 flagella that often wrap around the organism, and cause red tides.
Gonyaulax - answer✔Type of dinoflagellate covered by cellulose plates and have two flagella:
one extends backward, and the other, may help to keep the animal afloat.
Flagella - answer✔whiplike tails found in one-celled organisms to aid in movement
Pyrrophyta - answer✔a division of lower plants comprising unicellular and biflagellate algae
that form starchy compounds
Zooxanthellae - answer✔Symbiotic microscopic organisms found in corals and other marine
organisms
Red Tide - answer✔Red coloration, usually of coastal waters, caused by large quantities of
microscopic organisms (generally dinoflagellates); some red tides result in mass fish kills, others
contaminate shellfish, and still others produce no toxic effects.
Gymnodinium - answer✔species of dinoflagellate causes red tide
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