Answer:
B. Producing milk now requires electricity.
Hope this helps
A. can be used as an energy source by organisms.
DNA is made up of sugars and bases.
Fats are not glucose monomers. Carbohydrates are made up of glucose monomers.
C) slate, a metamorphic rock
We know that copper sulfate can be used in an experiment to test whether or not a protein is at hand, etc. Hope this helps!