Which of the following is a common feature of primary insect symbionts?
A) accelerated mutation rates only B) extreme genome reduction only C) high A+T content only D) accelerated mutation rates, extreme genome reduction, and high A+T content
A) a type of strigolactone hormone. B) lipochitin oligosaccharide signaling proteins produced by arbuscular mycorrhizae. C) examples of chemicals that mycorrhizae obtain from the soil. D) Carbohydrate structures that form connections between mycorrhizae and plants.
Horizontal gene transfer between insects 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.