In inhalation toxicology, forced expiratory volume may be defined as: a. volume of air exhaled per unit time b. residual volume plus vital capacity c. maximal inspiration and exhalation d. volume of air that is exchanged during restful breathing

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

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

2polnis which of the following is an advantage of an in vitro experiment?me