BOT 2100 Study Guide - Final Guide: Carbon Fixation, Anaerobic Respiration, Heterocyst
Document Summary
Haldane (england) proposed that early earth must have lacked o if organic compounds were to be made and persist otherwise organic compounds would. 2 have been oxidised to co and h. Natural gas reserves are from activities of methane producing prokaryotes of the past. One of a number of organisms which evolved oxygenic photosynthesis; 2h2o o2 + 4h+ + 4e endosymbiosis from phagocytized bacteria. Rather than being digested the bacterial precursor to mitochondria/chloroplasts were adopted, establishing a symbiotic relationship. Transformation of endosymbiont into an organelle usually involves loss of cell wall and other unneeded structures and gradual transfer of endosymbiont dna to the host"s nucleus; A single primary endosymbiotic event*(of ancestral cyanobacteria) about 1. 5 billion years ago gave rise to chloroplasts in chlorophytes (green algae and plants), red algae, and glaucophytes. Secondary, tertiary endosymbiosis brown algae, diatoms, dinoflagellates, euglenoids. Endosymbiosis in vorticella each bell-shaped cell of the protozoan vorticella contains numerous cells of the autotrophic, endosymbiotic alga chlorella.
