Check all the characteristics below that describe compounds. two or more elements chemically combined elements one type of atom cannot be separated into a simpler form definite proportions

A compound can be defined as a substance which is composed of the two or more elements that are combined together chemically. These constituent elements are present in definite proportion and quantities. The composing elements of a compound can be separated only by the means of the chemical procedures. A compound is composed of more than one type of atom.

Hence, the answer is ' two or more elements , chemically combined elements, more and definite proportions'.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.