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| Endoplasmic reticulum (image) |
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| __________ are tiny cell structures that carry out specific funtions within the cell. |
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| The rigid layer of nonliving material that surrounds the cells of plants and other organisms is called the ____ ____. |
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| In cells without cell walls, the ____ ________ forms the outside boundary that separates the cell from its environment. |
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| The _______ is a large, oval structure that directs all of the cell's activities. |
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| Strands of genetic material floating in the nucleus are referred to as ___________. |
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| The region between the cell membrane and the nucleus is called the _________. |
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| ____________ produce most of the energy the cell needs to carry out its functions. |
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| A maze of passageways called the ___________ _________ carries proteins and other materials from one part of the cell to another. |
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| _________ funtion as factories to produce proteins. |
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| _____ ___________ receive proteins and other newly formed materials and distribute them to other parts of the cell. |
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| Organelles called ____________ capture energy from sunlight and use it to produce food for the cell. |
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| The storage area of a cell is called a _______. |
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| _________ are small, round structures in cells that break down large food particles into smaller ones. |
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