Question

What is the result of successful communication between rhizobia and their plant hosts?

1) Rhizobia consume the plant tissue as an energy and carbon source, causing disease in the plant.
2) The plant consumes rhizobia as an energy source and carbon, destroying the invading bacteria.
3) The rhizobia invade the plant root and begin to fix nitrogen with the assistance of the plant.
4) The plant supplies organic forms of nitrogen to the rhizobia.

Answer 1

The result of successful communication between rhizobia and their plant hosts is the invasion of the plant root by the rhizobia, leading to nitrogen fixation.

Step-by-step explanation:

The result of successful communication between rhizobia and their plant hosts is option 3) The rhizobia invade the plant root and begin to fix nitrogen with the assistance of the plant.

Rhizobia are nitrogen-fixing bacteria that form a symbiotic relationship with legume plants. They invade the plant root and form specialized structures called nodules, where nitrogen fixation takes place. In this process, the rhizobia convert atmospheric nitrogen into ammonia, which is used by the plant as a source of nitrogen.

This mutualistic interaction between rhizobia and their plant hosts benefits both organisms. The plant receives a constant supply of nitrogen from the rhizobia, while the rhizobia obtain carbon compounds from the plant through photosynthesis.