You are presented with the question "What contains the green pigment chlorophyll?" and the following answer choices: 
- seeds
 - orchids
 - barnacles
 - cacti
 - plastids
 - ferns
 - Most plants
 - bioaerosols

Now knowing that chloroplasts contain the green pigment chlorophyll and chloroplasts are the most familiar plastids, choose the best answer.


 

     plastids    