Here's why:
* Spindle fibers are made of microtubules, which are protein filaments that form a structure crucial for separating chromosomes during cell division (both mitosis and meiosis).
* They attach to chromosomes at the centromere and pull them apart, ensuring that each daughter cell receives a complete set of chromosomes.
* During interphase (the stage between cell divisions), spindle fibers disassemble and are not visible.
Let me know if you'd like to know more about spindle fibers or cell division!
