BIOL 1001 Chapter : Biology Ch
Document Summary
Characteristics of living things: complex and organized. Water flea; complex and organized: they acquire materials and energy from their surrounding environment. Ex: plants utilize co2 and sunlight to make sugars; animals eat plants to obtain sugars for energy: they work to maintain their internal conditions. Homeostasis means staying the same : sweating when hot; shivering when cold, feeling thirsty when water is slow. Homeostasis requires energy: opposes natural trend to disintegration, obtained from external source. Homeostasis requires physical repair: parts break down, new materials required for repair. Extension of homeostasis: homeostasis= staying the same , growth=homeostasis plus extra. Timing: size, shape, living organisms respond to stimuli. Changes in internal environment: temperature, water level, blood sugar level. Changes in external environment: seek food and water, avoid bitterness, plants grow toward light, reproduction. Perpetuation of parents" genetics: genetic info stored in dna molecules, variation, offspring similar to both parents, offspring different from either parent, simple code with complex error correction system, evolution.
