It depends on which macromolecule you are referring to. As examples:
Protein monomers are amino acids.
DNA monomers are nucleotides.
Carbohydrate monomers are monosacharides.
Lipid monomers are fatty acids and glycerol.
Answer:
D. New allergens that people are not aware of may be introduced.
Explanation:
While increasing mineral contents or vitamins, people might have a strong allergy to a certain type of ingredient that the scientists added in to the food.
Answer:
Photosynthesis is the process by which plants and other things make food. It is a chemical process that uses sunlight to turn carbon dioxide into sugars that the cell can use as energy. As well as plants, many kinds of algae, protists and bacteria use it to get food.