Question

Which organisms are capable of converting gaseous nitrogen in the air into a form that other living organisms can use? (1 point)
a. nitrogen-fixing bacteria
b. denitrifying bacteria
c. decomposers
d. producers

Answer 1

Answer:

The correct option is A.

Explanation:

Nitrogen fixing bacteria: They are defined as the micro-organism which are capable of transforming atmospheric nitrogen into fixed nitrogen, this nitrogen is used by living organisms. They are basically two types:

1) One is free living bacteria such as blue-green algae (cyanobacteria), Azotobacter, and Clostridium.

2) Second is symbiotic bacteria such as Rhizobium which are symbiotic relationship with leguminous plants.