What is symmetric cell division?

Which two elements only need two valence electrons to be happy? Why is natural gas called natural gas? Which is not of the eight most common elements in earth's continental crust? Can single phase generator be run in parallel with single Phase EB supply? In the reaction 2H2o-----2H2 o2 What are the products? Two processes involved in using DNA to make proteins? What greenhouse gas would not be naturally occurring? What are the powers of pm? A gallon of milk weighs what in oz? How is vitamin B6 deficiency diagnosed? Is CaCO3 a solid or liquid? Who was the first anatomist? Does copper 60 decay? Which is heavier 2 tons or 30000 ounces? How man meter are there in a centimeter? How many protons neutrons and electrons are in a rutherfordium atom? What two Kingdoms are nearly the same except for where they can survive? What is the difference of Ampere Frame and Ampere Trip of Circuit Breaker? Can the load wires in an electrical service panel exit from the same end as the service cable and meet code? When is your body likely to be short of water?