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Bio chapter 1 notes.docx - An introduction to Biology 12...

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An introduction to Biology12 broad principles apply to all fields of biology.Principle 1:Cells.All organisms are composed of cellsCells are the smallest units of lifeNew cells come from pre-existing cells via cell divisionPrinciple 2:Energy.Cells that carry out chemical reactions to breakdown nutrients requires energyfrom RESPIRATIONThese chemical reactions may involve breakdown+ synthesis of cellular moleculesknown as METABOLISMPlants and other organism use the light energy to produce nutrients on their ownby PHOTOSYNTHESISPrinciple 3:Environment.All organism responds to environment changesPrinciple 4:Homeostasis.All organism continually regulates their cellular metabolism so nutrient moleculesare used at an appropriate rate and new cellular components when they areneededPrinciple 5:Grow and Develop.Growth produces more or larger cellsDevelopment is a sequence of changes in the state of cells, tissue, organ, ororganism, eventually resulting in organism with defined set of characteristics.Principle 6:Blueprint for reproduction.All living organism contains genetic material composed of DNADNA is heritable, which means that offspring inherit DNA from their parentsPrinciple 7:EvolveIt is a heritable change in a population of organism from generation togeneration, populations become better adapted to the environmentPrinciple 8:All species are related by an evolutionary history,Genome refers to the complete genetic composition of an organism or species,Proteome which is the complete protein composition of a cell or organismPrinciple 9:Structure determines functionPrinciple 10:Complex interactionBiologists use the term system biology to describe the study of how newproperties of life arise by complex interaction of its componentsPrinciple 11:Experimental scienceBiologist typically gather additional and ultimately form a hypothesis which is aproposed explanation for a natural phenomenonPrinciple 12:Biology effects our societyBiologists have discovered drugs that are used to treat many different humandiseases.

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Term
Spring
Professor
noor

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