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| act of noting or perceiving objects or events using the sense |
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| possible answer to a question based on the observations, knowledge, and reading |
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| a group in an experiment that recieves no experimental treatment |
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| the factor that is varied in an experiment |
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| the variable that is measured in an exxperiment |
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| a set of related hypotheses that have been tested and confirmed many times by many scientists |
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| a statement or fact meant to describe an action or a set of actions |
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| study of interactions of living things with other organisms and the environment |
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| study of reptiles and amphibeans |
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| complex living organisms are generated by decaying organic substances |
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| the generation of life from non-living matter |
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| the process of life forms pproducing other life forms |
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| living things that make their own food |
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| living things that eat other living things |
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| total of all reactions taking place in a cell |
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| chemical breakdown of glucose that uses simple substances to form more complex substances |
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| forming of a new organism by the union of reproductive cells |
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| reproduction of a living thing from only one parent |
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| a change in the environment that causes a reaction |
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| the smallest unit of matter that cannot be broken down by chemical means |
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| positively charged subatmoic particles |
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| uncharged subatomic particles |
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| negatively charged subatomic particles |
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| the number of protons in the nucleus of an element |
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| substance made up of only 1 kind of atom |
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| the number of protons plus the number of neutrons |
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| an element that has gained or lost more electrons |
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| a substance made of the joined atoms of 2 or more different elements |
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| a group of atoms together by converse bands |
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| bonds formed when atoms transfer electrons |
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| forms when 2 or more atoms share electrons to form a molecule |
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| compound that increases the concentration of hydrogen ions (h+) in a solution |
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| compound that reduces the concentration of hydrogen ions (H+) in a solution (increase OH-) |
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| attraction between same kind substances |
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| attraction between 2 different things |
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| attraction between water molecules preventing the surface of water from breaking water |
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| how much space is inside of an object |
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| a single celled organism that lacks a nucleic and other internal compartments |
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| a small piece of circular DNA that is separate from nucleoid DNA |
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| an organism whose cells have a nucleus |
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| controls most functions of the cell |
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| a section in the nucleus that makes the ribosomes |
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| nuclear membrane (envelope) |
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| a double membrane that surrounds the nucleus |
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| lipid bilayer with embedded proteins that enclose the cytoplasm |
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| an extensive system of internal membranes that move proteins and other substances through the cell |
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| organelles on which proteins are made |
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| a set of flattened membrane bound sacs that serves as the packaging and distribution center of the cell |
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| an organelle that harvests energy from organic compounds to make ATP |
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| small spherical organelles that contain the cell's digestive enzyme |
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| a large membrane - bound space that stores water, ions, nutrient and waste |
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| organelles that use light energy to make carbs from carbon dioxide and water |
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| diffusion of water througha selectively permeable membrane |
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| the movement of a subtance from an area of high concentration to an area of lower concentration |
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| transport of a substance against (low-high) its concentration gradient, that uses energy |
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| allows only certain substances in the cell's environment to pass through |
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| movement of a substance into a cell by a vesicle |
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| movement of a substance by a vesicle to the outside of a cell |
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| a repeating sequence of cellular division and growth during the life of an organism |
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| a segment of DNA that codes for a protein of RNA molecule |
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| a picture of the chromosomes found in an individual cell's during cell division arranged by size and shape |
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| the longest part of the cell cycle . made up of g1 s g2 |
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| a structure made of DNA and associated proteins tightly coiled |
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| two exact copies of dna that make up each chromosome; made after 1 strand of DNA copies itself |
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| the point at which the 2 chromatids are attatched to form a chromosome |
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| a cell that contains 2 sets of chromosomes |
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| a cell that contains 1 set of chromosomes |
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| similar chromosomes in size, shape, and genetic contents |
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| a type of cell reproduction involved in the growth and repair of cells |
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| occurs when portions of a chromatid on one homologous chromosome are broken and exchanged with the corresponding portion on the other homologous chromosome |
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| a type of cell reproduction involved in the formation of sex cells |
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| all of the carbon atoms in the chain bonded to 2 hydrogen atoms |
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| come carbon atoms are linked by a double covalent bond |
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