Which type of reins a rider uses, split reins or one rein, is a matter of personal preference. Split reins are commonly seen in the Western riding disciplines, although some Western riders might use one rein. Split reins are heavily preferred by most working cowboys and cowgirls.
Antimicrotubule agent, mitotic inhibitor Oncology An agent that inhibits cancer growth by stopping cell division Pharmacology A drug that inhibits or blocks mitosis in a particular phase of the cell cycleâeg, metaphase arrest caused by colchicine and vinca alkaloids. See Chemotherapy.
Introduction and Interphase. Mitosis is one of the two ways that cells divide. Mitosis is very important to living organisms and without it, life wouldn't be very long. Mitosis helps divide cells and make new and more cells, so if there wasn't Mitosis, people wouldn't grow at all. They would stay the same size as they were born, and would be very short.