? ??? ??? Osmosis Water leaving or entering a cell does so through a process known as __________. ??? ??? ??? Plasma membrane What part of a cell maintains the cells homeostasis? ??? ??? ??? Proteins A gene is a segment of DNA that controls the production of ________. ??? ??? ??? Cancer Viruses, environmental influences and radiation are examples of things that can cause _________. ??? ??? ??? Ser