What is a petriperm?

What is the source of heat for Yellowstone's geysers? How does someone obtain alcohol? The name of the structure that causes the synthesis of RNA to cease is called what? Which cell has a single line of chromosomes? What are the differences between the way terrestrial and jovian planet formation? Does salt hold water? In which part of a root will cells get longer as they specialise? How much water falls back as rain in the hydrologic cycle? Which continent doesn't have glaciers? What does an element's mass number tell us? What carries messages to the brain about sight? What organelles are used in investigating evolutionary relationships? What large fiber pathway connects the right and the left cerebral hemispheres? How many Times greater is one cup than one fluid ounce? How can you limit building near fault line? What is voltage drop calculation? Why do fingernails grew faster during cold season? How are potential energy and kinetic energy transferred on the first hill of a roller coaster? Corncob as Material for Particle Boards? What do you use to measure an ampitude?