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| the smallest structural and functional unit of an organism. |
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| an optical instrument used to look at very small objects, usually microscopic. |
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| to make sharp, clearer, focused |
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| a group of the same type of cells. |
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| a structure in the body that is composed of different types of tissue. |
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| a group of organs that work together to form a major function. |
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| a rigid layer of non-living material that surrounds the cells of plants. |
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| the outside boundary of a cell, controls what substances can enter or leave. |
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| the control center of the cell that directs the cells activities, contains DNA. |
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| thin layer surrounding the nucleus. |
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| found inside the nucleus, manufactures ribosomes. |
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| rod-shaped cellular structures, made of condensed chromatin; contain DNA that carries genetic info that controls inherited characteristics. |
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| tiny structures found inside cells, each has specific function. |
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