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प्रश्न
Write any three economic importance of algae.
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उत्तर
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Agriculture: Some of the blue-green algae are essential for the fixing of atmospheric nitrogen into the soil, which increases the fertility of the soil, for example, Nostoc, Anabaena.
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Agar-Agar: Agar Agar is extracted from some red algae, namely Gelidium, Gracillaria, etc., which is used to prepare growth medium in laboratories.
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Iodine: Iodine is obtained from brown algae like Laminaria (kelp).
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संबंधित प्रश्न
An example for colonial form of algae is
Binomial nomenclature was first introduced by _______
Match the following.
| Cyanophyceae | Green algae |
| Chlorophyceae | Blue-green algae |
| Phaeophyceae | Red algae |
| Rhodophyceae | Brown algae |
Which among the following has specialised tissue for conduction of water?
- Thallophyta
- Bryophyta
- Pteridophyta
- Gymnosperms
______ is a blue-green algae.
______ is used in space travel.
Minute algae floating on the surface of the water are called ______.
Agar-Agar is extracted from red algae.
The cell wall of algae is made up of a chemical substance called chitin.
Mention two forms of algae with examples.
