You are presented with the question "What are capable of dividing into two parts?" and the following answer choices: 
- epidermis and dermis
 - colors of the spectrum
 - rays or beams
 - bacteria
 - fissile isotopes
 - critical organs
 - objects that have mass
 - the body's largest organ

Now knowing that fission takes place when an animal divides into two parts and an isotope capable of undergoing fission is called a fissile isotope , choose the best answer.


 

     fissile isotopes    