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Mass to crawl along as a cohesive unit often referred

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mass to crawl along as a cohesive unit often referred to as a slug When slug reaches suitable spot, its component cells differentiate to form a fruiting body When spore germinates, it releases a cell that starts the life cycle anew Plasmodium o Plasmodium slide molds= spend most of life cycle as a multinucleated mass called a plasmodium. o Forms when a diploid cell divides its nucleus repeatedly by mitosis but doesn’t undergo cytoplasmic division Choanoflagellates o Choanoflagellates= thought to be the closest living protest relatives of animals. Name means “collared flagellate” Has flagellum surrounded by a collar of microvilli Sponges have cells with a similar structure Sporozoites migrate to insects salivary glands and await transfer to new vertebrate host o Toxoplasmosis: other disease caused by toxoplasma gondii 21.8 The Stramenopiles Stramenopiles= protest lineage that includes the photosynthetic diatoms and brown algae, as well as the heterotrophic water molds. Some members of the group have a hairy flagellum. o Most are autotrophs with chloroplasts Water molds o Or Oomycetes Heterotrophs that form a mesh of nutrient absorbing filaments Diatoms o Diatoms= diploid, photosynthetic, single celled or colonial protists that secrete a protective silica shell.
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Shell consists of 2 overlapping parts that fit one inside the other, like a shoe box and its lid Some have a cylindrical shape but others are square or needlelike Usually reproduce asexually Live in lakes, seas, and damp soils Brown algae o Multicelled protists living mainly in cool, coastal waters o Have commercial uses like food or nutritional supplements 21.9 Red Algae Red algae= live in clear, warm waters and multicelled marine algae o Red because their chloroplasts contain necessary pigments that absorb blue- green and green light o Have commercial uses Agar
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