BIOL-2152 Lecture Notes - Phototaxis
11 Mar 2014
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Document Summary
3 thylakoids to a band, central pyrenoid fucoxanthin primary pigment, chrysolaminarin is storage molecule silica cell wall/frustule physically strong and chemically inert protective covering frustules cannot be attacked enzymatically uptake of silicon does not require lots of energy enormously flexible morphologically but silica is impermeable, so lots of pores inextensible. 2 major segments which slide apart as the cells grow escape of cells of the wall is necessary during sexual reproduction new valves need to be secreted within the parental thecae new valves are smaller, so the average size of a population decreases over generational time girdle bands connecting bands overlapping one another essential to allow growth of the cell after cell division valves systems of silica ribs that have grown out from a circular or elongate pattern equipped with pores or slits for transfer pennate or radial symmetry motility raphe: line running the length of the valve.
