| A | B |
|---|
| Biology | The scientific study of life. |
| Analogous Structure | A physical structure, present in multiple species, that is similar in function but different in form and inheritance. |
| Forensics | The science of tests and techniques used during the investigation of crimes. |
| Homologous Structure | A physical characteristic in different organisms that is similar because it was inherited from a common ancestor. |
| Hypothesis | A proposed, scientifically testable explanation for an observed phenomenon. |
| Organ | An anatomical unit composed of tissues serving a common function. |
| Organ System | An anatomical system composed of a group of organs that work together to perform a specific function or task. |
| Organism | A form of life; an animal, plant, fungus, protist or bacterium. |
| Law (Scientific) | A law that generalizes a body of observations. At the time it is made, no exceptions have been found to a law. It explains things but does not describe them; serves as the basis of scientific principles. |
| Mechanism (Scientific) | The combination of components and processes that serve a common function. |
| Principle (Scientific) | ): A concept based on scientific laws and axioms (rules assumed to be present, true, and valid) where general agreement is present. |
| Science | A body of evidence-based knowledge gained through observation and experimentation related to the natural world and technology. |
| Theory (Scientific) | An explanation of observable phenomena based on available empirical data and guided by a system of logic that includes scientific laws; provides a system of assumptions, accepted principles, and rules of procedure devised to analyze, predict, or otherwise explain the nature or behavior of a specific set of phenomena. |
| Tissue | An anatomical unit composed of cells organized to perform a similar function. |
| Vestigial Structure | A physical characteristic in organisms that appears to have lost its original function as a species has changed over time. |
