Fact 1: Plants are multicellular eukaryotes with cell walls made of cellulose.

Fact 2: Basically, fiber is cellulose .

Given the two facts above, answer the question "Plants cell walls are made of " with the following options: 
- fiber
 - keratin
 - alveoli
 - cations
 - matter
 - CO 2
 - porous
 - Cane.


 

 fiber        