Bio 151 Week One Notes
Bio 151 Week One Notes BIO 151
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This 1 page Class Notes was uploaded by Chelsea Notetaker on Thursday January 14, 2016. The Class Notes belongs to BIO 151 at Central Michigan University taught by Professor Learman in Winter 2016. Since its upload, it has received 32 views. For similar materials see Human Biology in Biology at Central Michigan University.
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Date Created: 01/14/16
Week One, Biology 151 January 14, 2016 Viruses -Don’t have cells -Are structured as genetic material surrounded by a protein coat -Cannot metabolize nutrients, produce or excrete waste, move independently or reproduce (outside of another organism’s cells) -Populations of viruses change genetically over time (through mutation, adaptation and evolution) Science -Is a body of knowledge or field of study. -Is a systematic way to answer questions or a systematic method of investigation. Group Discussion Are viruses alive? Consider the requirements for identifying a living organism: 1) Living things are composed of cells 2) Living things have different levels of organization—both molecular and cellular organization and are organized at several levels such as tissue, organ, organ system, organism 3) Living things utilize energy (they eat food, drink water, absorb sunlight, absorb nutrients) 4) Living things respond to (or adapt to) their environment (such as responding to a stimulus: a tree losing leaves in the fall due to lack of sufficient sunlight to maintain the leaves) 5) Living things grow (division of cells, growth of cells, growth of organism) 6) Living things reproduce (this may be as simple as a cell dividing—it doesn’t need to be canoodling in the bedroom type reproduction) Determination: Viruses are not alive because they are not composed of cells and they cannot reproduce independently—that is, they cannot reproduce without being inside a ‘host’ cell.
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