Biological defense

Biological defense may refer to:

In biology

• often biological defense mechanism, a form of adaptation that promotes the survivability of an organism by protecting it from its natural enemies. Also see chemical defense and antipredator adaptation.

In law

• a claim that some biological factor present in the defendant provides a defense against the accused crimes, as in the so-called Twinkie defense.

In public health and the military

• Biodefense

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