Answer:
antibodies to a disease bacterium
Explanation:
its like a twisted ladder or a double helix
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Answer:
A cause or starting point the source of a rumor. 2 : the beginning of a stream of water the source of the Nile River. 3 : someone or something that supplies information a reference source. 4 : someone or something that provides what is needed a source of supplies a source of strength.
Disease, competition, and predation.