BIOL 111 Chapter Notes -Cambrian Explosion, Protist, Restriction Enzyme
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Also some of the above definitions do not apply to some living organisms: homeostasis: having a constant internal environment despite an ever changing external environment (ex. Body temperature) = requires complex feedback mechanisms between multiple sensory and physiological systems only possible in living organisms: evolution is also possible in living organisms change in physical characteristics over time. Radially symmetric: can be divided into two halves in any direction: lives on other planets don"t have to base on carbon. How many species exist: hunt for new organisms and new uses for known organisms is called bioprospecting, variety within and among living species is biodiversity. Kingdoms and domains: an overview: modern (opposite of fossil) species are divided into 3 large groups, called domains. Within each of these domains are smaller groups, called kingdoms. 2. 1 life as we define it: most appropriate way to classify life is based on the evolutionary relationships among organisms:
