Communication and transportation have improved as a result of scientific advancements

True.  Many innovators and inventors have used new scientific methods to develop and improve communication and transportation devices in many ways.  They were able to either make them faster or more fuel efficient.  They have also given rise to new ways to communicate such as the internet and have developed devices that make it easier for people to come together.

dna is made up of six smaller molecules -- a five carbon sugar called deoxyribose, a phosphate molecule and four different nitrogenous bases (adenine, thymine, cytosine and guanine).