The species concept is practical for identification of unfamiliar species and has been used to describe most of the 1.8 million known species on earth.

How are proteins and nucleic acids related? they both provide energy. they both carry genetic information. the structure of proteins is determined by nucleic acids. the subunits of nucleic acids are also the subunits of proteins.

Explain why it’s important for scientists to study the sun. list at least two challenges researchers face when examining earth’s nearest star.

What monomers build nucleic acid? how many are there?