An age cohort refers to
a. an aggregate of people born during the same time period.
b. the discrimination and prejudice toward a particular age group.
c. a type of age-based discrimination.
d. the hierarchical ranking of different age groups in society.

answer: "circumcision is a common procedure in which the skin covering the tip of the penis is surgically removed."

carbohydrates: (starches and sugars) composed of carbon, hydrogen, and oxygen.

lipids: (fats, oils, and waxes) are made of carbon and hydrogen atoms.

nucleic acids: contain hydrogen, oxygen, nitrogen, carbon, and phosphorus. they are polymers of nucleotides. a nucleotide has three parts, a 5-carbon sugar, a phosphate     (-po⬇️4) group, and a nitrogenous base.

proteins: made up of nitrogen, carbon, hydrogen, and oxygen. they are polymers of amino acids.