Mitotic spindles are microtubule-based structures that separate chromosomes during mitosis. So the cell would lack structure.
True that should be the answer
The answer is B. Natural selection will find a way to affect one, then that one will affect many others.
Option C would be correct. The organ system can plays many parts at one time. Also, it is the only system listed.
Hope this helps!
Since chloroplast use energy to make food for plant cells (Photosynthesis) I could compare it to lunch money, and how you have to keep refilling up, and up, just to use it again for food, for yourself.