... an exoskeleton to protect their organs. They possess a complete digestive system as well as a closed circulatory system. Their nervous system is made of a brain and a nerve cord. Furthermore, they possess appendages designed for movement. Perhaps an explanation of their complexity and diversity stemmed from their sexual reproductive techniques. Evolutionarily speaking, sexual reproduction allows for more diversity and potential for advancement. We ... ...

• Word Count: 377
• Approx Pages: 2