The heat inside the Tupperware causes an increase in pressure and when enough pressure builds, the atoms need somewhere to go and the seal at the top is easiest to break, so the top blows off.<span />
Perhaps the answer your looking for is, a tumor suppressor gene.
c.the cytoplasm will divide
Try this web site. It might have the answer. But you might have to scroll down some. https://quizlet.com/16339858/chapter-34-the-plant-body-flash-cards/