Es la suma de las masas atómicas de los átomos que constituyen una molécula expresados en unidades de masa atómica (u. m.a)
a) Peso atómico
b) masa molecular
c) número de masa
d) mol

substitution is the answer in this case

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.

well first you need the sample of the temperature and gas level. i couldnt write a hypothesis unless i had some data. i think temperature changes will effect volumes of gas because gas changed into a solid or liquid at specific temperatures.

her affection for her parents makes her an especially sympathetic character.