Final answer:
Genetic evidence supports the statement that all native Australians are descendants of a single migration event 50,000 years ago, rendering the statement true (A).
Step-by-step explanation:
The statement that all native Australians are descendants of a single migration 50,000 years ago (50 kya) is supported by genetic evidence and research. It aligns with the broader consensus that all humans descended from Africa, but as populations migrated out of Africa over tens of thousands of years, they populated various continents, including Australia. These first Australians are believed to have traveled there across Southeast Asia from the mainland of Asia more than 40,000 years ago. Their unique genetic variance found in Aboriginal Australians compared to other world populations supports the idea of a single major migration event.
Given the continuous genetic link between Aboriginal Australians and the genetic variance found that is unique to them, it’s safe to assume that the statement regarding their descent from a single migration some 50,000 years ago is true (A). It is critical to understanding the human journey and how we peopled various parts of the world at different times, leading to the diverse and rich tapestry of cultures we see today.