You are presented with the question "What continues to grow throughout their lives? " and the following answer choices: 
- potatoes
 - Hemoglobin
 - tortoises
 - plastic  roses.
 - Human teeth.
 - Lilies.
 - Silk daisies.
 - vegetation

Now knowing that most plants continue to grow throughout their lives and lilies continually produce new bulbs, from which grow new plants, choose the best answer.


 

      Lilies.   