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Importance of Gymnosperms
(i) Gymnosperms plants are used as ornamentals. Some are features in formal gardens – used for bonsai
(ii) Their fibers are used in the preparation of paper pulp.
(iii) Turpentine and resins are obtained from confers resin
(iv) Useful oils are extracted from gymnosperms like junipers, pines, hemlock, fir, spruces, and arborvitae.
(v) Gymnosperm seeds are used as food products such as bakery items.
(vi) Occassionaly used to create silk and other textiles
Importance of Algae
(i) Algae fixes Carbon dioxide with the help of photosynthesis
(ii) It increases the level of dissolved oxygen in their immediate environment
(iii) They produce rich compounds that serve as food for aquatic animals.
(iv) Marine algae are used as food. Eg: Laminaria and Sargassum
(v) Certain algae are used as hydrocolloids
(vi) Agar is used in growing microorganisms and in the preparation of jellies.
(vii) Chlorella is used as food by space travelers.