GEOL 3070 Chapter Notes - Chapter 11: Upwelling, Buoyancy, Chemosynthesis
25 Apr 2017
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All prokaryotes are unicellular with no internal membrane structures. Prokaryotes are composed of members of the domains archaea and. Eukaryote: grouping of organisms based on cell morphology. All eukaryotic cells contain internal membrane-bound cell structures, including the nucleus that contains cellular dna. Nucleus: part of a cell that houses the majority of the cell"s dna. Mitochondria: organelle (internal cell structure) used to derive energy from food in cells. Chloroplasts: used to harvest sunlight by photosynthesis in cells. Bioluminescence: this light is generated by the organisms themselves. Countershading: refers to organisms that have a dark dorsal surface (black) and light ventral surface (underside) to blend into the background. Temperature of surface water is influenced by season and latitude. Psychrophile: microorganisms that grow in cold temperatures such as those that live in sea ice. Poikilotherms: organism with a body temperature that varies according to the temperature of its surroundings. Homeotherms: organism with a body temperature that varies only within narrow limits.
