Ch1 Science of life Sec.1
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15 terms
Terms | Definitions |
|---|---|
 Biology | The study of life, offers an organized and scientific framework for posing and answering such questions about the natural world. |
| Organization | The high degree of order within an organism's internal and external parts and in its interaction with the living world. |
| Cell | The smallest unit that can perform all life's processes. |
| Unicellular | Organisms are made of one cell such as bacterias. |
| Multicellular | Organisms are made of multiple cells such as humans. |
| Organ | Structures that carry out specialized jobs within an organ system. |
| Tissue | Groups of cells that have similar abilities that allow the organ to function. |
| Organelles | Tiny structures that carry out functions necessary for the cell to stay alive. |
| Biological molecules | The chemical compounds that provide physical structure and that bring about movement, energy use, and other cellular functions. Organelles contain those. |
| Homeostasis | The maintenance of a stable level of internal conditions even though environmental conditions are constantly changing. |
| Metabolism | Sum of all the chemical reactions that take in and transform energy and materials from the environment. |
| Cell division | The formation of two new cells from an existing cell. The primary change that occurs following cell division is cell enlargement. |
| Development | The process by which an organism becomes a mature adult. it includes cell division and cell differentiation, or specialization. |
| Reproduction | All organisms produce new organisms like themselves in this process. Because no organism lives forever, it is important for the continuation of a species. |
| Gene | A short segment of DNA that contains the instructions for a single trait of an organism. |
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