Fact 1: Invertebrates are animals that lack a vertebral column, or backbone.

Fact 2: Lobsters are invertebrates, animals without a backbone.

Given the two facts above, answer the question "What do lobsters lack?" with the following options: 
- heat energy
 - Stomach
 - a cuticle
 - Claws
 - backbone
 - Eyes
 - the skin
 - Chlorophyll


 

     backbone    