Section 3

Plantlike and Funguslike Protists

• Algae can be unicellular, colonial, filamentous, or multicellular. Seven phyla of plantlike protists are Chlorophyta, Phaeophyta, Rhodophyta, Bacillariophyta, Dinoflagellata, Chrysophyta, and Euglenophyta.

• Green algae and plants have the same pigments, store food as starch, and have cell walls made of cellulose.

Vocabulary alga (p. 510) gametangium (p. 510) phytoplankton (p. 510) thallus (p. 510)

accessory pigment (p. 511) diatom (p. 512) shell (p. 512)

bioluminescence (p. 513)

• Slime molds are found on decaying matter and spend part of their lives as mobile feeding forms and the other part as stationary reproductive forms.

• Plasmodial slime molds are multinucleate, and cellular slime molds live as individual haploid cells. Water molds are composed of branching filaments.

red tide (p. 513) euglenoid (p. 513) fruiting body (p. 514) water mold (p. 514)

plasmodial slime mold

cellular slime mold (p. 514)

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