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

Fact 2: Geckos have backbones and are reptiles.

Given the two facts above, answer the question "Which of the following  animals is NOT an invertebrate?" with the following options: 
- shrimp
 - orchids
 - gecko
 - sheep
 - Schwinn
 - jellyfish
 - praying mantis
 - Birds


 

   gecko      