When was the first former ffa member elected to the U. S. presidency

The only FFA member to become US president was Jimmy Carter, elected in 1976.

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;