Question

Write a note on economic importance of algae and gymnosperms.

Answer 1

hey guies
................ the algae and Algae have diverse economic uses. They perform half of the total carbon dioxide-fixation on earth by photosynthesis.





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hope helps

Answer 2

Economic importance of algae
Algae have diverse economic uses. They perform
half of the total carbon dioxide-fixation on earth
by photosynthesis, acting as the primary
producers in aquatic habitats.
(a) Food source: Many species of marine algae
such as Porphyra, Sargassum, and Laminaria are
edible. Chlorella and Spirulinaare rich in proteins.
Thus, they are used as food supplements.
(b) Commercial importance: Agar is used in the
preparation of jellies and ice-cream. It is obtained
from Gelidium andGracilaria. Carrageenin is used
as an emulsifier in chocolates, paints, and
toothpastes. It is obtained from the red algae.
(c) Medicines: Many red algae such as Corallina
are used in treating worm infections.
Economic importance of gymnosperms
(a) Construction purposes: Many conifers such as
pine, cedar, etc., are sources of the soft wood
used in construction and packing.
(b) Medicinal uses: An anticancer drug Taxol is
obtained from Taxus. Many species of Ephedra
produce ephedrine, which can be used in the
treatment of asthma and bronchitis.
(c) Food source: The seeds of Pinus gerardiana
(known as chilgoza) are edible.
(d) Source of resins: Resins are used
commercially for manufacturing sealing waxes
and water-proof paints. A type of resin known as
turpentine is obtained from various species of
Pinus.