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Question
Write any three economic importance of algae.
Solution
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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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RELATED QUESTIONS
Brown algae belongs to ______ class.
Agar-Agar is obtained from _____ algae.
Which among the following has specialised tissue for conduction of water?
- Thallophyta
- Bryophyta
- Pteridophyta
- Gymnosperms
Assertion (A): Blue green algae are prokaryotes.
Reason (R): They do not have a true nucleus.
Blue-green algae are not placed under kingdom Protista whereas other algae are placed under it.
______ is a blue-green algae.
______ is an edible algae.
______ is an example of symbiosis between algae & fungi.
Mention two forms of algae with examples.
Mention two salient features of algae.
