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How to sign: (biology) a natural phenomenon involving living plants and animals
Categories: natural phenomenon
Within this category: abiogenesis, alternation of generations, annual ring, bioelectricity, circulation, cyclosis, death, decay, dehiscence, desquamation, diapedesis, exfoliation, facilitation, food chain, food pyramid, food web, gene expression, histocompatibility, life, life cycle, pleomorphism, polymorphism, recognition, rejection, rejuvenation, sex linkage