BIOL 1201 Chapter Notes - Chapter 1: Multicellular Organism, Chordate, Homeostasis
Document Summary
About 1. 8 million species have been identified and named. With so many different specifies there are many different unifying similarities. The ability to evolve is built into organisms. Evolution is a change in a genetic make-up of a population over time as a result of natural selection. Natural selection is the driving force behind evolution. There are variations within every species (ex. some are tall some are short) Means some are better suited to survival (natural selection) Variability comes from genes and genes are inherited. Conclusion: more good genes survive and therefore populations change. 2 life contains an order of structural levels with each level building on levels beneath it. Biosphere: layers of atmosphere) all of the environments on earth that are inhabited by life (land, water, all. Ecosystems: components with which life interacts (soil, water, air, light) all living things in a particular area, along with non-living environmental. Community: entire array of organisms inhabiting a particular ecosystem.
