A6-year-old child ate a peanut butter sandwich
at snack time in school. five minutes later, her
throat became swollen and she collapsed. this
allergic reaction occurred because her body
(1) recognized an antigen in peanut butter and
produced antibiotics against it
(2) digested the white blood cells that can
recognize an antigen in peanut butter
(3) did not recognize an antigen in peanut
butter and could not produce antibodies
against it
(4) recognized an antigen in peanut butter and
produced an immune response

In 2015, about ten percent of total u. s. energy consumption was from renewable energy sources. renewable energy plays an important role in reducing greenhouse gas emissions. when renewable energy sources are used, the demand for fossil fuels is reduced. sanjay and his family want to cut back on their use of non-renewable resources at home. they are thinking of an alternate way to heat their home without adding more greenhouse gases or pollutants to the environment. which renewable resource would not fit into their plan? a) solar power b) burning wood c) constructing a wind turbine eliminate d) generating hydroelectric power