The diameter of the aperture determines the intensity of light admitted. archeology: The study of human history and prehistory through the excavation of sites and the analysis of physical remains, such as graves, tools, pottery, and other artifacts.
The pupil of a human eye is a self-adjusting aperture. archetype: The original form or body plan from which a group of organisms develops.
Also used to describe the process of genetic change within a population, as influenced by natural selection.
The eggs are soft and vulnerable to drying, therefore reproduction commonly occurs in water.
antibacterial: Having the ability to kill bacteria.