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cell structure and theory vocabulary
write a clear and accurate definition for each of the following terms in the table below. use your textbook or notes to help you find the correct meanings.
term | definition
- cell membrane |
- cell theory |
- cell wall |
- chloroplast |
- cytoplasm |
- dna |
- eukaryotic cell |
- flagella |
- genetic material |
Define cell membrane and theory
The cell membrane is a semipermeable barrier regulating entry and exit. Cell theory states all organisms consist of cells.
Define cell wall and chloroplast
The cell wall provides structural support in plants. Chloroplasts conduct photosynthesis to produce glucose.
Define cytoplasm and DNA
Cytoplasm is the gelatinous fluid filling the cell. DNA is the molecule carrying genetic instructions.
Define eukaryotic cell and flagella
Eukaryotic cells contain a membrane-bound nucleus. Flagella are whip-like structures used for cellular movement.
Define genetic material
Genetic material refers to DNA or RNA carrying hereditary information.
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| No. | Term | Definition |
|---|---|---|
| 2 | Cell theory | The scientific theory stating that all living organisms are made of cells, and cells come from pre-existing cells. |
| 3 | Cell wall | A rigid outer layer found in plants, fungi, and bacteria that provides structural support and protection. |
| 4 | Chloroplast | An organelle in plant cells that captures sunlight to perform photosynthesis and produce chemical energy. |
| 5 | Cytoplasm | The gel-like fluid inside a cell that surrounds organelles and serves as the site for chemical reactions. |
| 6 | DNA | Deoxyribonucleic acid; the double-stranded molecule containing the genetic instructions for development and function. |
| 7 | Eukaryotic cell | A complex cell type containing a membrane-bound nucleus and specialized organelles. |
| 8 | Flagella | Long, whip-like appendages that project from the cell body and enable cellular movement. |
| 9 | Genetic material | The hereditary molecules (DNA or RNA) passed from parents to offspring that determine traits. |