DENDROLOGY

FOREST ECOLOGY

FOREST SUCCESSION

Please wait while the activity loads.
If this activity does not load, try refreshing your browser. Also, this page requires javascript. Please visit using a browser with javascript enabled.

If loading fails, click here to try again

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Bacteria living on the roots of some plants convert nitrogen gas to a form the plant can use. The bacteria get food from the plant. What kind of relationship is this?

A	commensalism
B	mutualism
C	parasitism
D	competition

Explanation:

Detailed explanation-1: -Legumes are able to form a symbiotic relationship with nitrogen-fixing soil bacteria called rhizobia. The result of this symbiosis is to form nodules on the plant root, within which the bacteria can convert atmospheric nitrogen into ammonia that can be used by the plant.

Detailed explanation-2: -The symbiotic nitrogen-fixing bacteria invade the root hairs of host plants, where they multiply and stimulate formation of root nodules, enlargements of plant cells and bacteria in intimate association. Within the nodules the bacteria convert free nitrogen to ammonia, which the host plant utilizes for its development.

Detailed explanation-3: -Some plants contain nitrogen-fixing bacteria Rhizobium in their root nodules. This relationship is known as mutualism.

There is 1 question to complete.