An embryologist is a scientist who studies organisms in their unborn or unhatched stages. How can this research benefit the study of evolution?

May someone me with these science questions

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?

What are the advantages of using the metric system? designed as a decimal system making conversions simpler more accurate system of measurement has prefixes that correspond to an amount to use with all base units used by the entire scientific community