Question

What characterizes facultative parasites, and how do they differ from obligate parasites?

A Facultative parasites can switch between parasitic and saprophytic lifestyles; obligate parasites cannot grow in axenic culture.
B Facultative parasites always live as parasites; obligate parasites can grow saprophytically.
C Facultative parasites exclusively grow as saprophytes; obligate parasites can switch to a parasitic phase.
D Facultative parasites and obligate parasites have the same characteristics.
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