2-下列何者爲生物結構(biological arganizaticm)由簡至繁組成的正確層次 (hierarchy) ? (A) organelle, tissue, biosphere, ecosystem, population, organism (B) molecule, cell, organ system, population, ecosystem, biosphere (C) organism, community, biosphere, molecule, tissue, organ (D) cell, community, population, organ system, molecule, organelle