Why does the solar nebula theory predict that planetary systems are common?

How does pH of the Intestines and temperature of the body together affect enzyme activity? If you are born 29 February do you count each year or only leap years? What natural resources are used to make plastic? Why does plasmolysis occur only in plant cells? Reactions the products are always carbon dioxide and water? Why don't people burn up from the heat of the sun? Who is credited with discovery of the atomic nucleus? What does the part of cellular respiration that happens in the mitochondria require? Which system is responsible for protecting the body through the protective layer of skin? Ask us What force is present at a divergent boundary? What is the difference between colorimeter and spectrophotometer? What would most likely happen if there is a change in the base sequence of this molecule? What are Mount St Helens emergency procedures? If at the equator is the sun directly above you? Why is diversity of life an important indicator of water quality? Where did Mercury's chemical symbol come from? What temperature does a metalloid acts as a conductor? What is a scientist who studies heredity called? What is 0.14p in pounds? Can oxygen and water pass through concrete?