| A | B |
|---|
| Organism | a living thing |
| cell | the basic unit of structure and function of all living things |
| unicellular | made up of only one cell |
| multicellular | made up of more than one cell |
| metabolism | the combination of chemical reactions through which an organism builds up or breaks down materials |
| stimulus | a change in the environment that causes an organism to react |
| response | the reaction of an organism to a change in the environment |
| development | the process of change that occurs during an organism's life that produces a more complex organism |
| growth | getting larger in size |
| asexual reproduction | reproduction that involves only one parent; the offspring are identical to the parent |
| sexual reproduction | reproduction that involves two parents; the offspring are a genetic combination of both parents |
| spontaneous generation | the idea that living things can come from nonliving things |
| controlled experiment | an experiment in which only one variable has been changed |
| autotroph | organisms that can make their own food |
| heterotrop | organisms that have to get their food |
| homeostasis | the ability to maintain a relatively constant internal environment. |
| classification | the process of organizing things based on their similarities |
| taxonomy | the study of classification |
| binomial nomenclature | the two name naming system for identifying organisms |
| genus | the first name in an organism's scientific name |
| species | organisms that can mate, produce offspring and whose offspring can also produce offspring |
| prokaryote | without a nucleus |
| eukaryote | with a nucleus |
| evolution | the process of change over time |
| branching tree diagram | shows the probable evolutionary relationships among organisms and the order in which specific characteristics may have evolved |
| shared derived characteristic | a trait that the common ancestor of a group had and passed on to its descendants |
| convergent evolution | the process by which unrelated organisms evolve similar characteristics |
