How do we normally decide which component of a mixture is the solute , and which is the solvent

We can determine whether a substance is a solute or solvent by looking if that substance dissolves or does the dissolving. Solvents are water, milk, ethanol, acetone etc while solutes are sugar, salt, coffee grounds etc

The basic repeating unit of nucleic acids are known as nucleotides. a nucleotide consists of three distinct chemical groups.

Atissue is a group of connected cells that have a similar function within an organism.