GLGY 307 Lecture Notes - Lecture 6: Prokaryote, Radiolaria, Plant

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Evaporites: rocks originally precipitated from a saturated surface near surface brine by hydrologies driven by solar evaporation, occurrences of evaporites in the strategic record are indicative for the existence of a warm and arid paleoclimate. Kingdom bacteria: includes very simple organisms, which do not have a nucleus in the cytoplasm. The oldest fossils on our planet (3. 465 billion years) belong to this kingdom. Bacteria dominated most of the earth"s history through stromatolites. This kingdom presents the most diverse array of metabolic strategies. Kingdom protista: consists mostly of single-celled, more rarely colonial, eukaryotic organisms; eukaryotes have well-defined nucleus or nuclei in the cytoplasm mass. Many eukaryote groups develop external protective structures (eg. test, frustule, lorica, etc. ) or an internal skeleton that has the role to support various cytoplasm components. Kingdom animalia: includes the most evolved organisms on earth. They present a homogeneous metabolic strategy: aerobic heterotrophy (aerobic respiration), and have the highest rate of evolutionary change among the five kingdoms.

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