BIOL165 Study Guide - Final Guide: Paralytic Shellfish Poisoning, Zoospore, Brown Algae
4 Apr 2017
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All had chloroplasts at some point but many have lost them plesiomorphy. Dinoflagellate have tertiary chloroplasts and are the only phylum to have this. Nucleomorph: b/w 2nd and 3rd membranes, remnant of red algal symbiont. Share system of sacs underneath their cell membranes alveoli. 12000 species free-living or attached anywhere there is water. Polyploid macronucleus, physiologically active with 1000s of gene copies, rna factory. Food passed from oral groove down to the cytostome and cytopharynx into food vacuoles. Food vacuoles: migrate around cytoplasm and allow digestion and distribution of contents. Conjugation: allows mating ciliates to exchange genetic material and divide the cell. Spores formed to allow transfer from one host to another multiple intermediate hosts. 5000 species but probs 1. 2-10 mil species variation in morphology apicoplast: non-photosynthetic secondary chloroplast. Diphasic or triphasic life cycle: no alternation of generations. Triphasic two hosts and 6 different stages. Sporozoites introduced in humans by mosquito, enter the liver where they undergo asexual repro.
