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10 Cards in this Set
- Front
- Back
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State what error bars are
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error bars are a graphical representation of the variability of data
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Explain how Standard Deviation is used to summarize the spread of values around the mean and that 68% of the data lies within one standard deviation of the mean
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A typical graph for standard deviation looks like a bell curve because most of the data is around the average with few outliers.
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Outline the cell theory
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-living organisms are made of cells
-cells are the smallest unit of life -cells come from pre existing cells |
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Exceptions to the cell theory
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-the first cell did not arise form other cells
-mitochondria/chloroplastsm have their own genetic material and reproduce independently of the cell -some cells are multi-nucleated -Unicellular organisms can be considered acellular |
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discuss the evidence for the cell theory
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-Mattias schleiden discovered all plant tissues are made of cells
-rudolf virchow observed that cells came from pre-existing cells -electron microscopes/light microscopes |
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state what unicellular organisms do
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carry out the functions of life
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compare the relative sizes of molecules, cell membrane thickness, viruses, bacteria, organelles and cells, using the appropriate SI Unit
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-human height 2 m
-muscle and nerve cells 1m -chicken egg 5cm -most plant and animal cells 100-10 micrometers -nucleus, bacteria, mitochondria 10-1 micrometers -viruses 100nm -ribosome 50-30 nm -protein 10nm -lipid 5-1 nm -molecules 1nm -atoms .1nm |
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SI unit prefixes
10^-2 10^-3 10^-6 10^-9 10^-12 |
centi
milli micro nano pico |
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explain the importance of surface area to volume ratio as a factor limiting cell size
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if a cell is too large it will not be able to get nutrients in and waste out fats enough
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state what mutlicellular organisms show
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emergent properties
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