Pellicle Cell membrane in Euglenas
Eyespot A small, pigmented structure in flagellate unicellular organisms that is
sensitiveto light; also called a stigma
Contractile vacuole A clear, fluid-filled vacuole in some groups of protists that takes up water within
the cell and then contracts, expelling its contents from the cell
Flagellar Groove A groove containing the flagella in some protists
Red Tide Seawater that is discolored by large numbers of certain dinoflagellates that
produce saxitoxin
Plasmodium Stage in life cycle of myxomycetes; a multinucleate mass of protoplasm
surrounded by a membrane
Phagocytosis The uptake of materials into a cell by invagination
Cellulose The chief component of the cell wall in plants and some protists
Sporangium A hollow unicellular or multicellular structure in which spores are produced
Carotenes A yellow or orange pigment belonging to the carotenoid group
Xanthophylls A yellow chloroplast pigment; a member of the carotenoid class
Phycobilin A group of water-soluble accessory pigments, including phycocyanins and
phycoerythrins, which occur in the red algaae and cyanobacteria
Whiplash Flagellum Shorter, smooth flagellum found on heterokonts
Tinsel Flagellum Long, ornamented flagellum found on heterokonts
Heterokont Organisms with one tinsel flagellum, and one whiplash flagellum; includes
oomycetes, chrysophytes, diatoms, brown algae, and certain other groups
Chrysolaminarin The storage product of the chrysophytes and diatoms
Fucoxanthin A brownish carotenoid found in brown algae and chrysophytes
Frustule Two parts of diatom cells that fit together like a shoebox
Silica Compound of which cell walls of diatoms are made
Zoospore A motile spore, found amont algae, oomycetes and chytrids
Antheridium A sperm-producing structure that may be multicellular or unicellular
Oogonium A unicellular female sex organ that contains one or several eggs
