The answer is 4.315 billion kilometers so it would be 4.315 x 10 to the 9th power if that is what is meant and Neptune is the eighth planet outward from the sun (the most distant planet from the sun) so it is a tremendous distance from the earth and would be very hard for humans to reach with such a distance.
Catalase is an enzyme in the liver that breaks down harmful hydrogen peroxide into oxygen and water. When this reaction occurs, oxygen gas bubbles escape and create foam.
Natural selection provides the outline of an explanatory theory." Biologists consider it to be a scientific fact that evolution has occurred in that modern organisms differ from past forms, and evolution is still occurring with discernible differences between organisms and their descendants.
The basic building block of a protein is called an amino acid. There are 20 amino acids in the proteins you eat and in the proteins within your body, and they link together to form large protein molecules.
