Which of the following involve symbiotic relationships?

Question

Quizplus · Accepted Answer

All of the choices listed involve symbiotic relationships:
- Rhizobia form nodules on the roots of legumes where they fix nitrogen for the plant in exchange for carbohydrates.
- Mycorrhizae form mutualistic associations with plant roots, helping them absorb nutrients in the soil.
- Ruminants, such as cows and sheep, have microbes in their stomachs that help break down plant material into nutrients they can use, and in turn provide a habitat for those microbes.

Which of the Following Involve Symbiotic Relationships