Question

The economical importance of algae

Answer 1

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economic importance:

➡️photosynthesis:

• at least half of the total carbon dioxide fixation on earth is carried out by algae through photosynthesis.
•being photosynthetic they increase the level of dissolved oxygen in their immediate environment.
•it is essential for respiration of aquatic life.

➡️Primary producers :

•algae are primary producers of energy rich compounds.
•This form the basis of food cycles of all aquatic animals.

➡️food supplements:

•many species of porphyra, laminaria and sargassum are among the 70 species of marine algae used as food.
•Certain unicellular algae like chlorella and spiral inner are rich in protein and are used as food supplements even by space travellers.

➡️hydrocolloids :

•hydrocolloids are water holding substances. certain marine brown and red algae produce large amount of hydrocolloids which are used commercially.
•algin and carrageen are hydrocolloids obtained from brown and red algae, respectively.
•agar is one of the commercial products obtained from gelidium and Gracilaria and are used to grow microbes and in preparation of Ice creams and jellies.

➡️iodine :

•fucus and laminaria are rich sources of iodine.

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Answer 2

$\large\bf\underline\purple{Economic\:Importance\:of\:Algae}$

$\underline{\bigstar{\sf\ Food\:Source}}$

Many species of marine algae such as Sargassum and Laminaria are edible.

$\underline{\bigstar{\sf\ Commercial\:Importance}}$

Agar is used in the preparation of jellies and ice cream. Carrageenin is used as an emulsifier in chocolates, paints and toothpastes.

$\underline{\bigstar{\sf\ Medicines:}}$

Red algae such as Corallina are used in treating worm infections.

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