Write a note on economic importance of a | Class 11 Biology Chapter Plant Kingdom, Plant Kingdom NCERT Solutions

Question: Write a note on economic importance of algae and gymnosperms.
Answer:

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.


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Comments

  • Nikita
  • 2019-08-30 07:10:33

This answer help us in many ways. So very very thanku to you for giving this easy and short answer

  • Poorva
  • 2019-07-06 19:55:44

Thanks for this amazing answer,,,😊😊

  • Poorva
  • 2019-07-06 19:55:07

Thanks for this amazing answer,,,😊😊

  • Sheeba
  • 2019-06-23 14:06:52

Ur answer r too big try to write small answer which is easy to learn and write

  • arunima
  • 2019-06-14 20:25:07

thanks

  • Rubal banga
  • 2019-02-10 11:35:24

Thanx

  • Rubal banga
  • 2019-02-10 11:35:11

Thanx

  • Shara
  • 2019-02-05 14:29:25

Very clear and thanks

  • Soniya
  • 2019-02-01 20:29:12

Try to write short answer which helpfull to learn easily sir this answer is right but it is so long .....

  • Vijay
  • 2018-08-23 15:16:22

I want uses of algae

Comment(s) on this Question

Welcome to the NCERT Solutions for Class 11 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 1 , Question 5: Write a note on economic importance of algae and gymnosperms.....

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