When an antigen attacks the body, it activates adaptive immunity. this adaptive immunity produces a strong response when it encounters the same antigen for the second time. which feature of adaptive immunity is essential for this kind of response? a) the ability to remember the antigen it encounters b) the ability to distinguish between self and nonself antigens c) the ability to produce nonspecific antibodies against the foreign antigen d) the ability to secrete lysozymes against pathogenic antigens

Suppose you use three different scale to weigh a bag of organges. one scale says the nag weighs 2.1 lb, and third says it weighs 2.1 lb. the actual weight of the bag of organges is 2.153 lb. which of the following best decribes these results?

What is the membrane that sheath of schwann cell containing cytoplasm and nucleus that encloses myelin

The us council on environmental quality, the world wildlife fund of the united states, the ecological society of america, the smithsonian institution, and the international union for the conservation of nature have proposed four principles of wildlife conservation. which of the following does not apply to wildlife conservation? a) continuous monitoring, analysis, and assessment b) ecosystem maintenance that includes wildlife c) a plan encompassing entire communities of organisms and all renewable resources d) a continued interest in harvesting populations for sport