BIOL 1001 Chapter : Chapter Notes I.docx
Document Summary
3. 1 biodiversity biosphere; all regions of the earth"s crust, waters and atmosphere that sustain life reflected in the biodiversity of the earth. Ecosystem: group of communities interacting with their common physical environments. Multicellular organism: unit consisting of more than one cell. Cell: smallest unit able to live and reproduce independently or as part of mutilcellular organism. Organized into groups based on specific characteristics. 3 main domains: bacteria nucleoid (no membrane, archea resemble bacteria visulally however are closer to eukarya"s molecular composition, eukarya - nucleus. Reading trees: lines intersect = common ancestor (common features) Chemotrophs obtain e by oxidizing inorganic or organic substances. Selection occurs when force/phenomenon affects the survival/life of a specific organism. Large population exposed to severe factor where only resilient individuals will reproduce. Disease breaks out at hospital / certain flowers don"t make it through winter. 3. 3 c land: organisms conquer a new frontier.
