What is the major long-term source of a foreign antigen in the body?

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#Question id: 14827

#XL - S Microbiology

The structures used for motility in both eukaryotes and prokaryotes are

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#Question id: 11914

#XL - T Zoology

Alder trees, which harbour nitrogen-fixing bacteria in their roots, provide nitrogen to soils developing on sandbars rivers, this is an example of,

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#Question id: 2044

#XL - S Microbiology

Antibodies specific for different epitopes on the same antigen:

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#Question id: 4957

#XL - T Zoology

How many half-lives should have elapsed if 6.25% of the parent isotope remains in a fossil at the time of analysis?

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#Question id: 11973

#XL - T Zoology

The digestion of ________ begins in the stomach.