Refer to the figure showing a phylogenetic tree of immunodeficiency viruses. 
As the figure shows, phylogenetic analysis of HIV and nonhuman SIV demonstrates that HIV is _______ and SIV is _______.
Definitions:
Demand
The total quantity of a good or service that consumers are willing and able to purchase at a given price level in a given period.
Network Design Decisions
Strategic choices made regarding the layout and functioning of a supply chain network, including locations of facilities and distribution routes.
Supply Chain Configuration
The arrangement and integration of the supply chain's various components, including suppliers, production facilities, distribution centers, and customers, to maximize efficiency and effectiveness.
Responsiveness
The ability of a company or system to quickly react to changes in demand, technology, or market conditions.
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