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| The rigid,porous outer layer os a plant. |
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| A bundle of microtubules that helps organize themovementof chromosomes during cell divison. |
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| An organelle that converts the radiant energy of the sun into chemical energy through the process of photosynthesis. |
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| A network of passageways in which chemical compounds are manufactured,processed,and transported. |
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| A stack of membranes that collects,modifies,and packages chemical compounds. |
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| A small sac thatcontains digestive chemicals. |
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| Organellries that,using oxygen,convert nutrients into energy that can be used by the cell. |
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