BIOL 121 Lecture Notes - Lecture 2: Prokaryote, Phototroph, Autotroph
12 Apr 2015
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Cells: size = 10 to 20 cells per filament so. Very small bacillus shape (rod shaped), in chains. Photoautotroph photosynthesis using light energy and carbon dioxide to form energetic organic molecules. Heterocyst specialized cell for fixing nitrogen (nitrogen to ammonia for amino groups and other uses) Gelatinous sheath holds cells in filament, protects filament from predator or harmful environmental factors. Thylakoids membranes to increase surface area for photosynthetic pigments. Binary fission in the context of fragmentation, if chain is broken it replaces lost cells.
