Intro to protists1A eukaryote is an organism whose cells contain complex structures enclosed within membranes. There are8 major eukaryotic lineages: Amoebozoa, Opisthokonta, Excavata, Plantae, Rhizaria, Alveolata,Stramenopiles and Fungi. Eukaryotes that are not plants, fungi and animals are called Protists.2Primary endosymbiosis is referred to as a process in which a eukaryote engulf another prokaryote. It maythen use that organism to its advantage. The 3 major lineages of Archaeplastida that resulted from this areunicellular, colonial or multicellular forms. Green algae and Glaucophytes are Green in colour while Redalgae are Red in colour.3Secondary endosymbiosis occurs when a living cell engulfs another eukaryotic cell that has undergonePrimary endosymbiosis. After the initial endosymbiosis, the original hybrid cell reproduced and one of thenew offspring was engulfed by another non-photosynthetic organism, allowing that new cell to bephotosynthetic. This is all possible because of a double membrane that was made by the first layer of theendosymbiosis in primary endosymbiosis, and the membrane of the cell that was engulfed in secondaryendosymbiosis forms the second layer. This is the reason that mitochondria and chloroplasts have a doublephospholipid bi-layer.4Plants, algae, euglena and bacteria are major groups of Photosynthetic Eukaryotes. Among these Plants aremajor contributors of oxygen to the atmosphere.5Red tides are a marine phenomenon in wh ...
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