Chapter 2 : Microorganisms - Friend and Foe | NCERT | Standard 8 | Science
Channel: Chinmaya A.S.V
Date: 2020-08-16

A simple video in which we discuss the types of micro-organisms. 
1. Bacteria
2. Fungi
3. Protozoa
4. Algae
We discuss in detail how these are useful and how they can be harmful. 
We touch upon the topic of nitrogen cycle and nitrogen fixation. 
All the best to you !
















All images used in the video are public domain except the below mentioned images which are under Creative Commons. The Licences and the attributes are mentioned below with my sincerest thanks to the authors...
Fungi Collage - By BorgQueen - Sources clockwise from top left: File:Amanita muscaria tyndrum.jpg, File:Scarlet elf cap cadnant dingle.jpg, File:Mouldy bread alt.jpg, File:Spizellomycete.jpg, File:Aspergillus.jpg, CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=7395392
Omphalotus nidiformis -By Cas Liber - Own work, CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=2036005
Armillaria solidipes-By Alan Rockefeller - This image is Image Number 8037 at Mushroom Observer, a source for mycological images., CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=7059948
Edible Mushrooms - By FotoosVanRobin from Netherlands - Asian mushrooms, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=2904514
Paramecium aurelia-By Barfooz at the English Wikipedia. - Originally uploaded to the English Wikipedia, where it was made by Barfooz., CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=172055
Eutrophication - By Alexandr Trubetskoy - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=19117918
Penicillium Pengo-CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=1774920
Penicillium sp. under bright field microscopy-By Dr. Sahay - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=28383655
The kelp forest exhibit at the Monterey Bay Aquarium:By Stef Maruch - kelp-forest.jpg, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=3140862
Phytoplankton,By ja:User:NEON / commons:User:NEON_ja - Own work, CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=1669485
Harvesting algae-By Aquaticweedharvester at English Wikipedia, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=54180778
Algae Sea Bed - By Toby Hudson - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=18150674