Genes are instructions that make cells work--like a code--and DNA is what genes are made of. All living things have genes and DNA, so they are an undeniably crucial part of life, evolution, and of a... This description may be from another edition of this product.
ThriftBooks sells millions of used books at the lowest everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $15. ThriftBooks.com. Read more. Spend less.