It can be said that a vaccine does not prevent infection; rather it primes the immune system to respond to an invader. using information about human immune response, explain this statement. mention what happens in the body from the time of vaccination through contact with the infectious agent.

Which list shows the levels of organization of an organism in hierarchical order from left to right, from the smallest to the most complex?

Read the following scenario to answer the following question. over the past 60 years, many amphibian species have experienced significant population declines, and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. when most populations of a wide-ranging amphibian species are lost and the few remaining populations are widely separated, we expect to see that a. the founder effect becomes increasingly important b. microevolution no longer occurs c. gene flow between populations is reduced d. artificial selection becomes a greater factor in microevolution

Works together in the synthesis, modification, packaging, and transport of lipids and proteins