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Ch 10 Living Things
| Term | Definition |
|---|---|
| organism | any living thing |
| cell | basic unit of structure and function for organisms |
| unicellular | one celled organism |
| multicellular | organisms composed of many cells |
| metabolism | the combination of chemical reactions through which an organism builds up or breaks down materials |
| stimulus | any change or signal from the environment that can make an organism react in some way |
| response | an action or change in behavior that occurs as a result of a stimulus |
| development | the process of change that occurs during an organism's life to produce a more complex organism (ie baby to adult) |
| asexual reproduction | reproductive process involving only one parent; offspring are identical to the parent. |
| sexual reproduction | a reproductive process that involves two parents; combines genetic material to produce a new organism that is different from either parent |
| spontaneous generation | the mistaken idea that living things come from nonliving sources |
| autotroph | an organisms that is able to produce it's own food |
| heterotroph | an organism that cannot make its own food |
| homeostasis | the condition in which an organism's internal environment is kept stable in spite of changes in its surroundings |
| classification | grouping together similar organisms |
| taxonomy | the scientific study of how living things are classified and named |
| binomial nomenclature | two-part scientific naming system (classification) |
| genus | a classification grouping that consists of closely related organisms; part 1 of binomial nomenclature |
| species | a group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce |
| prokaryote | unicellular organism that lacks a nucleus |
| nucleus | the part of a cell that contains DNA; the brain of the cell |
| eukaryote | an organism whose cell contains a nucleus |
| evolution | change over time; the process of a species passing down helpful adaptations |
| branching tree diagram | a diagram that shows probable evolutionary relationships among organisms and the order in which specific characteristics my have evolved |
| shared derived characteristic | a characteristic or trait that the common ancestor of a group had and passed on to its descendants |
| convergent evolution | the process by which unrelated organisms evolve (develop over time) similar characteristics |
Created by:
Ms. Begley
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