BIOL 1001 Chapter : Chapter 1
Document Summary
Characteristics of living things: complex and organized. Salt (crystal) sodium chloride very simple but very organized. Water flea- organized and complex: they acquire materials and energy from their surrounding environment. Plants utilize co2 and sunlight to make sugars. Animals eat plants to obtain sugars for energy. Byproducts: they work to maintain their internal conditions. Extension of homeostasis: homeostasis = staying the same , growth = homeostasis plus extra. Genetically programmed: 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, reporduction. 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. Genetic composition of population changes (evolves: differential survival (natural selection, selects advantageous adaptations. Not based on a belief system based on experimental results and observations.
