According to this evolutionary tree, the archaea and eukaryotes last shared a common ancestor ________. 
Definitions:
Demand for Health Care
The quantity of health-related services that consumers are willing and able to purchase at various prices, reflecting society's need for medical services.
Health Care as a Right
The principle that access to health care services should be universally available and not dependent on an individual's ability to pay.
Medical Technology
The application of scientific knowledge and devices to improve healthcare, including diagnostics, treatment, and patient care.
Medicare Subsidies
Financial support provided by the government to help lower the cost of Medicare for eligible individuals.
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