Terms : Hide Images
| 7225716496 | Biosphere | The entire portion of Earth inhabited by life; the sum of all the planet's ecosystems. | 0 | |
| 7225716497 | Cell | A basic unit of living matter separated from its environment by a plasma membrane; the fundamental structural unit of life. | 1 | |
| 7225716498 | Community | An assemblage of all the organisms living together and potentially interacting in a particular area. | 2 | |
| 7225716499 | Controlled Experiment | A component of the process of science whereby a scientist carries out two parallel tests, an experimental test and a control test. The experimental test differs from the control by one factor, the variable. | 3 | |
| 7225716501 | Ecosystem | All the organisms in a given area, along with the nonliving (abiotic) factors with which they interact; a biological community and its physical environment. | 4 | |
| 7225716502 | Emergent Properties | New properties that emerge with each step upward in the hierarchy of life, owing to the arrangement and interactions of parts as complexity increases. | 5 | |
| 7225716505 | Evolution | Descent with modification; the idea that living species are descendants of ancestral species that were different from present-day ones; also the genetic changes in a population over generations. | 6 | |
| 7225716506 | Gene | A discrete unit of hereditary information consisting of a specific nucleotide sequence in DNA (or RNA, in some viruses). Most of the genes of a eukaryote are located in its chromosomal DNA; a few are carried by the DNA of mitochondria and chloroplasts. | 7 | |
| 7225716507 | Hypothesis | (plural, hypotheses) A tentative explanation a scientist proposes for a specific phenomenon that has been observed. | 8 | |
| 7225716508 | Natural Selection | A process in which organisms with certain inherited characteristics are more likely to survive and reproduce than are organisms with other characteristics. | 9 | |
| 7225716509 | Organ | A structure consisting of several tissues adapted as a group to perform specific functions. | 10 | |
| 7225716510 | Organ System | A group of organs that work together in performing vital body functions. | 11 | |
| 7225716511 | Organelle | A membrane-enclosed structure with a specialized function within a cell. | 12 | |
| 7225716512 | Organism | An individual living thing, such as a bacterium, fungus, protist, plant, or animal. | 13 | |
| 7225716513 | Population | A group of individuals belonging to one species and living in the same geographic area. | 14 | |
| 7225716514 | Producer | An organism that makes organic food molecules from CO2, H2O, and other inorganic raw materials: a plant, alga, or autotrophic bacterium. | 15 | |
| 7225716516 | Theory | A widely accepted explanatory idea that is broad in scope and supported by a large body of evidence. | 16 | |
| 7225716517 | Tissue | An integrated group of cells with a common function, structure, or both. | 17 |
