Is it true or false that adenine always pairs with guanine?

If mass and volume decrease why does density stay the same? In which state would you be if you were canoeing on the black wood river? Does latitude run north to south or east to west? What is the difference between a conceptual model and a physical model? Does bedrock cause more shaking than mud? Why do scientists think Mars and Europa are good places to look for signs of life? What happens on a topographic map the closer the contour lines get? What eats paramecium? Why will a dish of water freeze if put into pan of alcohol and air is blown over it? Which are lowlands that were eroded by glaciers and transformed into wide deep basins? Who proposed the idea of inheritance of acquitted characteristics? What are some solid materials in the atmosphere? How do you increase energy in drinking water? What is the price per kilowatt hour in America? What is the function of the mustard oils found in Brassica plants? What is normalising a wave function? What mineral is used in dentistry medicine jewelry? If a yellow jacket can fly 4.5 meters in 9 seconds how many meters per minute? Is the shape of the orbit of each planet is a circle true? How much money does reed timmer make per episode of storm chasers?