Rhizobia and Mycorrhizae Share All of the Following Features Except

Multiple Choice

Rhizobia and mycorrhizae share all of the following features except

A) they both benefit by receiving carbohydrate from the plant.
B) many are host-specific.
C) they both become parasitic in nutrient-rich environments.
D) they both enhance the growth of most plants.
E) they both are found in most ecosystems of the world.