Biology Chapter 18: Protists Flashcards

Organism composed of one or more cells containing a nucleus and other membrane-bounded organelles.

Eukaryotic organism that is not a plant, fungus, or animal.

The idea that mitochondria and chloroplasts originated as free-living bacteria engulfed by other cells.

<p>They are eukaryotes that are not plants, fungi, or animals.</p> Signup and view all the answers

<p>Protists form the base of many aquatic food webs; are parasites causing disease in plants and animals; help find oil reserves; and have multiple practical uses, including making paints reflective and making chocolate smooth and creamy.</p> Signup and view all the answers

<p>Studying protists reveals the evolutionary history of mitochondria, chloroplasts, multicellularity, and other eukaryotic kingdoms.</p> Signup and view all the answers

<p>Aquatic photosynthetic protist.</p> Signup and view all the answers

<p>Unicelled, flagellated protist with elongated cell.</p> Signup and view all the answers

<p>Unicellular, aquatic protist with 2 flagella of unequal length; many have cellulose plates.</p> Signup and view all the answers

<p>Photosynthetic aquatic protist with 2 flagella and yellowish accessory pigments.</p> Signup and view all the answers

<p>Photosynthetic aquatic protist with 2-part silica wall.</p> Signup and view all the answers

<p>Multicellular, photosynthetic aquatic protist with swimming spores and brownish accessory pigments.</p> Signup and view all the answers

<p>Multicellular, photosynthetic marine protist with red or blue accessory pigments.</p> Signup and view all the answers

<p>Photosynthetic protists that have pigments, starch, and cell walls similar to those of land plants.</p> Signup and view all the answers

<p>They are photosynthetic but some may be heterotrophic at times.</p> Signup and view all the answers

<p>Criteria include types of photosynthetic pigments, composition of the cell wall, storage carbohydrates, number of flagella, and whether they are unicellular, colonial, or multicellular.</p> Signup and view all the answers

<p>(1) Euglenoids: unicellular flagellates; (2) Dinoflagellates: marine algae with cellulose plates and two flagella of different lengths; (3) Golden algae: yellowish accessory pigments; (4) Diatoms: ornate shapes and 2-part silica shells; (5) Brown algae: marine algae with complex body forms; (6) Red algae: marine algae with reddish and bluish pigments; (7) Green algae: chlorophylls a and b, starch, cellulose cell walls, alternation of generations.</p> Signup and view all the answers

<p>Protist in which the feeding stage consists of a huge cell containing many nuclei.</p> Signup and view all the answers

<p>Protist in which feeding stage consists of individual cells that come together as a multicellular 'slug' when food runs out.</p> Signup and view all the answers

<p>Filamentous, heterotrophic protist with swimming spores; also called oomycete.</p> Signup and view all the answers

<p>They are heterotrophs.</p> Signup and view all the answers

<p>Both types are heterotrophic protists living in damp habitats and produce spores when food becomes scarce. Plasmodial slime molds form a huge mass of nuclei with a single membrane, while cellular slime molds retain individual membranes and can exist as one-celled organisms or aggregates.</p> Signup and view all the answers

<p>Water molds are decomposers; they are also parasites of plants and animals. They ruined crops, triggering the Irish potato famine in the 1840s and nearly destroyed the French wine industry in the 1870s.</p> Signup and view all the answers

<p>Unicellular protist that is heterotrophic and motile.</p> Signup and view all the answers

<p>Unicellular heterotrophic protist with 1 or more flagella.</p> Signup and view all the answers

<p>Flagellated protist that causes human diseases.</p> Signup and view all the answers