BIO 123 Lecture Notes - Lecture 6: Bioluminescence, Meiosis, Apicomplexa
Document Summary
All eukaryotes are not plants, animals or fungi. Some stramenopiles are as complex as plants. Green plants, red algae, glaucophytes: chloroplasts with two membranes. Single pushing flagellum, flat cristae: animals, fungi, relatives. Excavata: feeding groove, some with no functional mitochondria. Rhizaria: no cell walls (some have other coverings), slender pseudopods. Some groups once thought to be amitochondriate. Sexual reproduction known only in some parabasalids. Two nuclei, each associated with four flagella. Single nucleus, rod of microtubules, 4-5 flagella. All live inside animals, most ingest bacteria, archaea, organic matter. Common inhabitant of termite guts, digest cellulose. No cell wall, interlocking protein molecules under plasma membrane. All are ingestive, some have chloroplasts (secondary endosymbiosis from green algae) Some have eyespots, a single swimming flagellum, +1. Some have silica or calcium carbonate external skeletons. Pseudopods project through holes in calcium carbonate shells. Use pseudopods to catch and ingest small cells or organic matter. Evidence that common ancestor acquired chloroplasts by secondary endosymbiosis.
