Weight gain occurs when a person consumes too much/many
a. calories
b. fat
c. carbohydrates
d. protein
okay so im thinking either a or b?

Whic disease reduces bone density and causes the bones to become brittle

Why girls are tan and why they fake tan

Group of genes that encode molecules found in all body cells, creating a biochemical “fingerprint” that serves as the “id” for cells so that they are marked as “self” a) deoxyribonucleic acid (dna) b) entry inhibitors c) major histocompatibility complex (mhc) d) non-nucleoside reverse transcription inhibitors (nnrtis)