You are presented with the question "growth in what is caused by primary and secondary meristems in roots?" and the following answer choices: 
- H 2 O
 - bamboo
 - population
 - offspring
 - bushes
 - bulbs
 - clouds
 - size

Now knowing that roots have primary and secondary meristems for growth in length and width and size is measured by width and length, choose the best answer.


 

        size 