Raul Reyes: Amid the hoopla over the fight of the century there is a shameful silence on Mayweather's long history of domestic violence. He says instead, the big payday for the fighter -- and promoters and sponsors -- appears to reward behavior that is epidemic in America.
All living substances use DNA. The only reason the term genetic material is usd, is because we use mRNA to carry the DNA message, and viruses also use mRNA as their genetic material.
Like all living cells, they are made of matter. In fact, all things are made of. matter. Matter is anything that takes up space and has mass. Matter, in turn, is made up of chemical. substances. In this lesson you will learn about the chemical substances that make up living things. CHEMICAL SUBSTANCES. A chemical substance is matter that has a definite composition.