Which biomolecule is used for building muscles, hair, and nails? O Nucleic Acids
O Proteins
Ś
O Lipids
O Carbohydrates

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explanation:

a chair, a bed, and a toothbrush

explanation:

answer; i believe the answer is (polygenic inheritance;

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).