Advertisements
Advertisements
प्रश्न
Blue green algae fix _________ directly from air to enhance fertility of soil.
Advertisements
उत्तर
Blue green algae fix atmospheric nitrogen directly from air to enhance fertility of soil.
Explanation:
Plants and animals cannot take atmospheric nitrogen directly. Certain bacteria and blue-green algae present in the soil fix nitrogen from the atmosphere and convert it into compounds. Once nitrogen is converted into these usable compounds, it can be utilised by plants from the soil through their root systems.
APPEARS IN
संबंधित प्रश्न
Which free living microorganism helps in nitrogen fixation?
The nitrogen molecules present in the air can be converted into nitrates and nitrites by
Give reason for the following.
Farmers prefer to grow beans and peas in nitrogen deficient soils.
Match Column - I with Column - II.
| Column - I | Column - II | ||
| (a) | Nitrococcus | (i) | Denitrification |
| (b) | Rhizobium | (ii) | Conversion of ammonia to nitrite |
| (c) | Thiobacillus | (iii) | Conversion of nitrite to nitrate |
| (d) | Nitrobacter | (iv) | Conversion of atmospheric nitrogen to ammonia |
Choose the correct answer from the options given below.
The bacteria present in the root nodules of leguminous plants is ______.
The atmosphere is a rich source of ______.
Nitrogen is an essential component of protein, DNA, and chlorophyll.
Draw a neat flow chart of the Nitrogen cycle. Briefly explain the various processes involved in the nitrogen cycle.
Name the cell which is responsible for nitrogen fixation in cyanobacteria.
Match column I with Column II.
| Column I | Column II |
| A Acidic | (i) Phenylalanine (Phe) |
| B Neutral | (ii) Cysteine (Cys) |
| C Aromatic | (iii) Valine (Val) |
| D S(Sulphur) containing | (iv) Asparagine (Asn) |
Select the correct answer from the options given below.
