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.

Question

Quizplus · Accepted Answer

Horizontal gene transfer between host organisms and their symbionts has been observed, but it is considered a rare event.

Horizontal Gene Transfer Between Host Organisms and Their Symbionts