Gold is actually very soft. If rings were made of pure gold they would bend and become disfigured. Other elements are added to give the ring its stability.
<span>Deionized water is regarded as pure water, which is a compund, not a mixture. A mixture requires that there are 2 different pure componds combined, with a homogeneous mixture requiring that the apperance is consistent and uniform. Because it is a compound, deionized water cannot be a homogenous mixture. instead, an example of a homogeneous mixture would be salt water</span>
D excretory system releases waste like when you use the bathroom and stuff. :)
Compliment bases mean that guanine is always paired to the cytosine, adenine is paired with thymine. They are referred to nucleotides. It is important because the four bases are components of your DNA. The chemical interaction is what forms a double helix.