Fact 1: Plants use cellulose for their cell walls.

Fact 2: Animals lack cell walls.

Given the two facts above, answer the question "What do animals lack?" with the following options: 
- chromosomes
 - warmth
 - Energy
 - polysaccharides
 - Bodily water
 - fur and fat
 - microbes
 - cellulose


 

        cellulose 