You are presented with the question "Cells are what, so they are the building blocks of organisms?" and the following answer choices: 
- Most plants
 - so small
 - all matter
 - homogenous
 - so deadly
 - so fortunate
 - so big
 - bacteria

Now knowing that cells are the microscopic building blocks of organisms and cells are so small that they can only be seen under a microscope, choose the best answer.


 

  so small       