a group of people who share a common ancestora person from whom you descend; grandparents, great-grandparents, great-great-great grandparents, etc., direct-line ancestor, forefather or forebear More and similar genetic markers. Haplogroups are used to study human evolutionthe gradual development of something from a simple to a more complex form; a gradual, progressive change; in nature, different organisms develop and diversify from earlier forms; Darwin's theory of natural selection seeks to explain the process of evolution of all organisms More and migrationthe movement of populations (a collective) of people from one area to another; migration is usually a response caused by climate, diminishing food supplies, war, disease, or catastrophic natural events (floods, volcanic eruptions, earthquakes); may be by land or by sea, or in today's world by evacuations.
