Horizontal Gene Transfer Between Host Organisms and Their Symbionts

question 17

Multiple Choice

Horizontal gene transfer between host organisms and their symbionts

• A) happens frequently because of coevolution.
• B) causes genome reduction in the symbiont and genome expansion in the host.
• C) causes genome reduction in both the host and the symbiont.
• D) has been observed, but is considered a rare event.

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