Binary Fission is the process by which bacteria reproduce, also known as asexual reproduction. I hope this helps. If not, comment below and I will do my best to get back to you ASAP, and don't be afraid to go to your teacher for help; it will be much easier on you to have someone explain it to you physically. :)
A Pinocytic vesicle is a structure which helps in the Pinocytic process, where the small particles are bought into the cell, forming an infolding or invagination which in turn are suspended in the small vesicles. This process is also known as Cell Drinking.
