Cwestiwn Mawr

Sut mae maetholion yn cylchu mewn biomau?

• Adnodd A

  
  
  

• Adnodd B

  
  
  

  

  
  
  

  

• Adnodd C

  
  
  

  Llun 1 - Coedwig law drofannol

  
  

  Ffynhonnell: https://www.flickr.com/photos/dams999/8031191709
  Dams999 - Attribution-NonCommercial-NoDerivs 2.0 Generic

  
  

  Llun 2 - Diffeithdir

  
  

  Ffynhonnell: https://commons.wikimedia.org/wiki/File:Sahara_1.jpg
  Flickr - This file is licensed under the Creative Commons Attribution 2.0 Generic license.