BIOL 1001 Chapter : Biology 1 3
Document Summary
3 maintain internal conditions- homeostasis means staying the same. Ex- sweating when hot, shivering when cold, feeling thirsty when water is low. Organized systems disintegrate, preventing disintegration requires energy homeostasis requires energy, opposes natural trend to disintegration, obtained from external source homeostasis requires physical repair. Parts break down and new materials are required for replay. Food supplies material and energy: growth- extension of homeostasis. Simple code with complex error correction system: evolution- genetic composition of population changes (evolves) Not based on a belief system, based on experimental result and observations. 3 natural processes drive evolution: genetic variation/competition among variants, not all survive, adaptive characteristics inherited. All life on this planet are made of either eukaryotic or prokaryotic. Eukaryotic- single or multi-celled, nucleus and other organekkes, larger (10x) more complex these are protists, plants, fungi, and animals these cells have been on earth for about 2 billion years. There are 3 domains of living organiss: bacteria, archaea, eukarya.
