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Chap. 2 Science Voc.
| Term | Definition |
|---|---|
| Organism | living things |
| Cell | the basic unit of structure and function in an organism |
| Unicellular | single celled organism |
| Multicellular | organisms composed of many cells |
| Stimulus | a change in a organism's surrounding that cause the organism to react |
| Response | an act or change in behavior |
| Development | the process of change that occurs during an organism's life to produce a more complex organism |
| Spontaneous Generation | the mistaken idea that living things can arise from nonliving sources |
| Autotroph | organisms that make their own food |
| Heterotroph | organisms that can not make their own food |
| Homeostasis | the maintenance of the stable internal conditions |
| Classification | the process of grouping things based on their similarities |
| Taxonomy | the scientific study of how living things are classified |
| Binomial Nomenclature | a naming system called Linnaeus |
| Genus | a classification grouping that contains similar, closely related organisms |
| Species | a group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce |
| Prokaryote | are organisms whose cells lack a nucleus |
| Nucleus | a dense area that contains nucleus acids |
| Eukaryote | members of the domain Eukarya live in this domain |
| Microscope | an instrument that makes small objects look large |
| Cell Theory | a widely accepted explanation of the relationship between cells and living things |
| Organelle | the cell structures, that carry out specific functions within the cell |
| Cell Wall | a rigid layer of nonliving materials that surround the cell of plants and some organisms |
| Cell Membrane | the barrier after the cell wall |
| Cytoplasm | the region between the cell membrane and nucleus |
| Mitochondria | suddenly, rod-shaped structures loom ahead |
| Endoplasmic Reticulum | a maze of passageways past the cytoplasm |
| Ribosome | grain like bodies attached to the endoplasmic reticulum |
| Golgi Body | looks like flat sacs and tubes, can be tought of as the mail room |
| Chloroplast | only plants have these green organelles |
| Vacuole | are past the chloroplast and is a large filled sac |
| Lyosome | are around the vacuole and are small round structures containing chemicals that break down certain materials in the cell |
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