When two different organisms exhibit a similarity in the pattern of embryological development, it is an indication that the two organisms have descended from a common ancestor. Similarity in embryological development is accepted by biologists as further evidence of common ancestry to back up evidence obtained from fossil finds.
Much of Botswana and Namibia is covered by desert that can support few people. Botswana's climatic pattern is typical of southern Africa, although its rainfall is less than countries further east. As with Namibia, temperatures increase by about 6 degrees for every 100 m you descend. As a result, Namibia's park is hotter, especially those located in the desert. Rainfall is higher in the far North, including Etosha, and the Zambezi Region. Further south the climate is hotter and drier.
White matter is found in the deeper tissues of the brain, It contains nerve fibers (axons), which are extensions of nerve cells Many of these nerve fibers are surrounded by a type of sheath or covering called myelin. Myelin gives the white matter its color.
I think it'd be change in allele frequencies & microevolution.
Step by step hope this helps mark brainest plz