Helpzzz Explain how physical variation is expressed in human beings and how it relates to culture groups and ethnicity?

If a robot fixed another robot is it a engineer or doctor?

What are two ways that harvesting algae from the ocean may benefit human society? how might the harvest of algae negatively impact the ocean communities where that algae grows? how could this be prevented?

We can be sure that a mole of table sugar and a mole of vitamin c are equal in their 1) mass in daltons. 2) mass in grams. 3) number of molecules. 4) number of atoms. 5) volume.