Free Living Nitrogen Fixer Identification
The question requires identifying an organism that fixes atmospheric nitrogen (N2) independently, without forming a symbiotic relationship with a host plant.
Analysis of Nitrogen-Fixing Organisms
- Azotobacter: This bacterium is known to fix atmospheric nitrogen while living freely in various environments like soil and water. It is a classic example of a free-living nitrogen fixer.
- Rhizobium: This bacterium is symbiotic. It lives inside the root nodules of leguminous plants and fixes nitrogen in partnership with the plant. It doesn't fix nitrogen independently in a free-living state.
- Frankia: Similar to Rhizobium, Frankia is a filamentous bacterium that forms symbiotic associations, known as actinorhizae, with the roots of certain non-leguminous plants. It is not free-living.
- Dorylimes: This genus belongs to ants (insects) and is unrelated to nitrogen fixation processes.
Determining the Free Living Nitrogen Fixer
Comparing the options, only Azotobacter meets the criteria of being a free-living organism capable of nitrogen fixation.
Important Questions from Ecology
Which ecologist is famous for studying plant life in the Indiana Dunes in 1896?
What is the study of interactions between a living organism and its environment?
In the context of ecology, the given equation shows the relationship between the size of an area and the number of species present in it. Accordingly, by which letter is the regression coefficient denoted?
log S = log C + Z log A
Hedgegroves in an agricultural landscape typify
Metapopulations, a series of separated subpopulations,
