| A | B |
|---|
| nerve tissue | Carry messages back and forth between the brain and rest of body |
| homeostasis | An organism's internal environment is kept stable |
| vertebrae | Bones that form the backbone |
| skeletal system | Which system supports and protects the body and makes blood cells? |
| epithelial tissue | Tissue that lines the stomach |
| tissue | Made up of a group of cells |
| cell | Basic unit of structure and function in the human body |
| nucleus | Directs the activities of a cell |
| cell membrane | The outside boundary of a human body cell |
| genes | Factors that control traits |
| probability | The likelihood that a particular event will occur |
| domimant alleles | TT Trait will always show up in the organism |
| Punnett square | A chart that shows all the possible outcomes that can result from a genetic cross |
| phenotype | An organism's physical appearance |
| karyotype | A picture of all the chromosomes in a cell arranged in pairs |
| mutations | A change in a gene or chromosome - Cause genetic disorders |
| XY | Male sex chromosomes |
| pedigree | A chart that tracks which members of a family have a particular trait |
| cloning | Creates an organism that is genetically identical to the organism from which it was produced. |
| fossils | The preserved remains or traces of an organism that lived in the past |
| variations | Any difference between individuals of the same species |
| species | A group of similar organisms that can mate with each other and produce fertile offspring |
| extinct | A species tht does not have any living members |
| homologous structures | Similar structures that related species have inherited from a common ancestor |
| branching tree | A diagram that shows how scientists think different groups of organisms are related |
| evolution | The gradual change in a species over time |
| adaptation | A trait that helps an organism survive and reproduce |
| overproduction | A species creating more offspring than can possibly survive |
