Question

. 1 2 3 4 Which of the following is a beneficial relationship between microorganisms and other organisms? Viruses causing diseases in the roots of various plants. Bacteria metabolizing sugars in the fermentation of organic compounds. Bacteria living in human intestines assisting in digestion. Parasites infecting oak trees, preventing them from producing acorns.

Answer 1

1Q) several bacteria live in human intestine and assist in digestion which are beneficial to even humans such as Ecoli, etc

2Q) Nitrogen fixing bacteria provide a usable firm if nitrogen for other organisms and help in nitrogen cycle. Some of Nitrogen fixing bacteria are azospirillum, clostridium, rhizobium. There is symbiotic and non symbiotic nitrogen fixation.