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| Organisms whose cells have a distinct nucleus and membrane-bound organelles. |
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| Are cell structures that are specialized for different functions. |
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| Organisms whose cells lack a nucleus and membrane-bound organelles. |
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| Is the thick,semifluid material that is enclosed by the plasma membrane. |
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| Directs and controls most cellular activities. |
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| Surrounds the nucleus and controls the passage of materials between the nucleus and the cytoplasm. |
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| DNA is bundled into structures called ____________________, which are located in the nucleus. |
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| Prokaryotes have ring-shaped pieces of DNA called ____________________, which are also suspended in the cytoplasm. |
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| The basic units of structure and function in all organisms. |
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| Is a thin, flexible layer that surrounds the cytoplasm. |
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| Makes a variety of proteins that are used throughout the cell. |
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| Are the organelles that carry out cellular respiration. |
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| is a rigid structure that surrounds the plasma membrane of some cells, giving them additional protection and support. |
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| Are organelles that capture the energy of sunlight and use it for photosynthesis. |
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| An organelle that stores water and other important materials, including salts, proteins, and carbohydrates. |
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| Are sections of DNA that code for specific traits. |
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| Is a process that produces specialized cells with different structures and function. |
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| Most multicellular organisms start as fertilized eggs or _________________. |
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| The unspecialized cells that reproduce themselves and have the capacity to differentiate into one of many types of specialized cells. |
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| The process by which the information in genes is used to make proteins. |
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| A complex mechanism determines whether a gene is turned on or off in a cell. |
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