You are presented with the question "What do turnips use to grow in length and width?" and the following answer choices: 
- epidermal
 - light energy
 - Energy.
 - bacteria
 - meristem
 - fungi
 - viruses
 - Energy

Now knowing that roots have primary and secondary meristems for growth in length and width and special types of primary roots are tap roots or turnips, choose the best answer.


 

     meristem    