Select your answer:
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Reproduction › ViewMade of DNA this is the basic physical and functional unit of heredity.
A. Chromosomes
B. Genes
C. DNA
D. Nucleus
Respiratory and Circulatory › View
Levels of organization from smallest to largest
A. organelle, cell, tissue, organ, organ system, organism
B. cell, tissue, organelle, organ, organ system, organism
C. organism, organ system, organ, tissue, cell, organelle
D. organism, organ system, organ, organelle, tissue, cell