BIOL 2200 Chapter Notes - Chapter 587-593, 608-609, 648-654, 661-665: Archaeplastida, Cyanobacteria, Karyogamy
22 Feb 2017
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Document Summary
Protists = diverse, mostly unicellular group of eukaryotes. Taxa essentially encompasses and eukaryote that is not a plant, animal, or fungi. Eukaryotes have well-defined cytoskeletons to aid in structure and mobility. Unicellular protists perform the same tasks as organs, but using subcellular organelles. Some protists make their own food, others consume food, and others do a combination of both. Mixotrophs = combine photosynthesis and heterotrophic nutrition. Reproduction and life cycles vary greatly among protists. Amitochondriate protists actually have mitochondria, but in reduced forms. There are four supergroups of eukaryotes that we believe evolved simultaneously from a common ancestor. Excavated groove on one side of the cell body. Photosynthetic organisms, some of which arose from secondary endosymbiosis. Includes red algae, green algae, and some land plants. Much protistan diversity is a result of endosymbiosis. The defining moment in the origin of eukaryotes is the engulfing of a mitochondrion. Mitochondria in eukaryotes evolved from a single common ancestor.
