Chapter 20

All protists _____ a. lack mitochondria b. are aquatic c. live as single cells d. have a nucleus

Deposits of shells from ancient _____ have been transformed to chalk and limestone. a. dinoflagellates b. diatoms \(c\) radiolaria d. foraminifera

The presence of a contractile vacuole indicates that a single-selled protist _____ a. is marine b. lives in fresh water c. is photosynthetic d. secretes a toxin

_____ is an anaerobic flagellated protist that causes a common sexually transmitted disease. a. Plasmodium b. Chlorclla c. Trichomonas d. Giardia

An insect bite can transmit a malaria-causing _____ to a human host. a. trypanosome b. apicomplexan c. ciliate d. diplomonad

_____ are the closest relatives of the land plants. a. Green algae b. Red algae c. Brown algae d. Euglenoids

Accessory pigments of _____ allow them to carry out photosynthesis at greater depths than other algae. a. euglenoids b. green algae c. brown algae d. red algac

Some _____ are bioluminescent and other live inside the bodies of corals. a. red algae b. diatoms c. dinoflagellates d. radiolaria

The _____ are important plant pathogens. a. dinoflagellates b. ciliates c. water molds d. slime molds

A high concentration of oil helps _____ stay afloat and makes them useful in biofuel production. a. foraminiferans b. radiolarians c. dinoflagellates d. diatoms

The sporophyte of a multicellular alga _____ a. is haploid b. is a single cell c. produces spores d. produces gametes

Cellular slime molds most often live _____ a. on the forest floor b. in tropical seas \(c\), in an animal gut d. in mountain lakes

Some euglenoids have chloroplasts that evolved from _____ by secondary endosymbiosis. a. a green alga b. a red alga c. a dinotlagellate d. cyanobacteria

All green algae _____ a. have a cell wall b. are marine c. are multicellular d. are descended from red algae

Match each item with its description. $$ \text { choanoflagellate } \quad \quad\quad\quad\quad \text {a. chalky- shelled heterotroph } $$ $$ \text { radiolarian} \quad \quad\quad\quad\quad \text {b. silica-shelled autotroph} $$ $$ \text {foraminiferan} \quad \quad\quad\quad\quad \text { c. deep dweller with phycobilins} $$ $$ \text {diatom} \quad \quad\quad\quad\quad \text {d. close relative of animals } $$ $$ \text {brown alga} \quad \quad\quad\quad\quad \text { e. community of tiny heterotrophs} $$ $$ \text {red alga } \quad \quad\quad\quad\quad \text {f. multicelled, with fucoxanthin } $$ $$ \text { zooplankton} \quad \quad\quad\quad\quad \text {g. silica-shelled heterotroph } $$