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| The six steps of the scientific method |
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| make ovser ations, ask questions, propose answer, test hypothesis, accept of reject hypothesses, repear the test. |
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| standard unit of lenght is the ___ and is equal to ____ inches |
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| 5 things used to measure volume |
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| flask, pipette, pipette dropper, beaker and graduated cylinder |
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| the standard unit of mass |
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| a kilo gram is how many grams? |
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| can be manipulated or changed by the reseatcher |
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| the observed the outccome of the test |
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| variables that must remain constant during the test |
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| keeps ocular and objective lenses at proper distance from each other |
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| permits interchange of low medium and high power objectives |
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| supports body tube and ocular |
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| contain lenses of various magnifications |
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| coarse adjustment changes _____ between slids and focuses and image and fine adjustment permits _______ ________ |
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| regulates amount of light going through specimen |
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| the thickness of an object that is all in sharp focus at the same time |
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| made in advance using time consuming techniquest material killed, solvents added, embedded in wax, and sliced into thin sections |
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| living tissues or cells ar desired for investigation |
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| has two oculars magnification lower that with compound light microscope |
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| phase-contrast microscope |
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| uses regulat light rays for illumination good for viewing live material |
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| transmission electron microscope |
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| passes electrons rather than light waves through specimen |
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| scanning electron microscope |
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| usues moving beam of electrons to bounce the electrons off the specimen |
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| working distance of a microscope |
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| distance between slide and object |
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| circular field you see through the ocular |
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| carbohydrates lipids proteins and nucleic acids |
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| Simplest of the carbohydrates |
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| Benedicts reagant is used to test for what? |
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| reducing sugars, the abilty for a monosaccharide of disaccharide to add elctrons to other molecules |
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| what is added to detect the presence of starch |
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| What is used to detect presence of lipids |
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| proteins are made of ________________ linked by ______ bonds |
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What is used to find protein |
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| what two things are tryglicerides made of |
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| smaller molecules making up chains to form polymers |
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| Reducing sugars are ______ madthat release _____ and give the _______ to other molecules |
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| lipids are soluble in ____ and _______ |
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| two lipids that are insoluble in each other |
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| inner packages called______ float around in ____ |
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| provides structure and rigidity to plant cell |
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| fluid that acts as suspending medium |
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| supporting framework of cell that is used for cell transport |
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| they are nucleic acid that is used in protein synthesis |
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| double layered sace that produce ATP |
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| flattend vacuole sac that synthesizes carbogydrates and packages moldcules for secretion |
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| sacs of enzymes that digest foreign molecules and worn cells |
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| oganizes spindle fibers and assists mitosis |
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| membrane sacs that store and excrete substances within the cytoplasm |
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| support cytoplasm and transport materials |
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| movement of particles along cell surface of move cell |
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| direct cell activity and forms ribosomes |
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| visisble under high power microscope minute particles of solid matter bacteria and other tiny organisms in a liquid suspension seem to move constantly in an erratic course |
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| particels in a solution tend to move from areas where there are higher concentration to ares of lower concenration |
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| when cells are place in a hypotonic solution they ____ and ____ which is called ___if they are place in a hypertonic solution the _____ _____ and ____this is called_____ |
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| swell and burts lysisl lose water and shrink called crenation |
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| when a cell has enough water to push the cell membrane firmly against the wall |
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