Final answer:
Uniformitarianism and Actuality are important principles in Biogeography. Uniformitarianism explains how Earth's surface was shaped by slow-moving geological processes in the past, while Actuality focuses on the current factors affecting the distribution of organisms. Both principles contribute to understanding the geographic distribution of plants and animals based on evolution and tectonic plate movement over time.
Step-by-step explanation:
Uniformitarianism and Actuality are two principles that are important in the development of Biogeography. Uniformitarianism is the concept that Earth's surface was shaped in the past by slow-moving geological processes, while Actuality refers to the current factors affecting the distribution of plants and animals. In the field of Biogeography, these principles help explain the geographic distribution of organisms based on evolution and tectonic plate movement over time.