BIOL 1001 Chapter : Bio Ch 1
Document Summary
Plants utilize co2 and sunlight to make sugars. Animals eat plants to obtain sugars for energy. Water fleas are organized and complex: structure is complex and organized, acquire materials and energy from surrounding environment, work to maintain their internal conditions. Homeostasis means, staying the same : sweating when hot; shivering when cold, feeling thirsty when water is low. Preventing disintegration requires energy: opposes natural trend to disintegrate, obtained from external source, parts break down, new materials required for repair, growth, growth = homeostasis plus extra. Genetically programmed: timing ex. duration of pregnancy, 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, simple code with complex error correction system. Offspring different from either parent: evolution, differential survival (natural selection; darwinism)
