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प्रश्न
What is a heterocyst?
Give the role of a heterocyst.
उत्तर
The Blue Green Algae (BGA) have some specialized colourless cells called heterocysts which are the sites of nitrogen fixation.
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संबंधित प्रश्न
What are 'biofertilizers'? Explain them with suitable examples.
Identify free-living bacterial bio-fertilizer.
Identify the CORRECT statement regarding Ectomycorrhizae.
Identify the CORRECT statement regarding Mycorrhiza.
Match the Column I (Organisms) with the Column II (Products they produce) and select the correct option.
| Column I | Column II | ||
| i. | Lactobacillus | p. | Cheese |
| ii. | Saccharomyces cerevisiae | q. | Curd |
| iii. | Aspergillus niger | r. | Citric Acid |
| iv | Acetobacter aceti | s. | Bread |
| t. | Acetic Acid |
Which of the following statements are CORRECT regarding Anabaena and Frankia?
Which of the following symbiotic microorganisms is nitrogen-fixing?
Biofertilizers are
Why are blue green algae not popular as biofertilisers?
Azolla is used as biofertiliser because it ______.
