Leguminous Plants

Q.

Which of the following is free-living nitrogen-fixing bacteria present in the soil?

1. Azotobacter

2. Nitrosomonas

3. Rhizobium

4. Pseudomonas

Q.

Is Azotobacter a nitrogen-fixing bacteria?

Q.

Question 6
The process of nitrogen-fixation by bacteria does not take place in the presence of:

(a) molecular form of hydrogen
(b) elemental form of oxygen
(c) water
(d) elemental form of nitrogen

Q.

A prokaryotic autotrophic nitrogen fixing symbiont roots are found in

1. Alnus

2. Cycas

3. Cicer

4. Pisum

Q. Nitrogen-fixing bacteria resides in the of a leguminous crop.

Q. What is nitrogen fixation? How do leguminous plants help in nitrogen fixation?

Q.

Mention the microorganisms involved in nitrogen fixation.

Q. Farmers use Rhizobium to fix _____ levels in the soil.

1. carbon
2. iron
3. nitrogen
4. oxygen

Q.

Which of the following microorganism is involved in nitrogen fixation?

1. $Rhizobium$
2. $Aspergillus$
3. $Chlamydomonas$
4. $Spirogyra$