Fact 1: Aplanet rotating causes cycles of day and night on that planet.

Fact 2: Each planet rotates at a different pace.

Given the two facts above, answer the question "Each planet has what?" with the following options: 
- different cycles of day and night
 - genetic diversity
 - identical atmospheres
 - life
 - structure and function
 - water
 - global ecosystems
 - important habitats


 

 different cycles of day and night        