In 1962, walter stoeckenius described the structure of the plasma membrane using electron microscopy. he described some micrographs as having the appearance of three layers, with two dense outer layers and a lighter middle layer. however, it is well‑established that the plasma membrane is a bilayer. in his paper, stoeckenius also stated that previous papers had established the bilayer structure of the membrane. sapling

i do believe its (d) it allowed the government to offer pioneers sixty acres of western land if they lived on it and made improvements to it.

explanation: signed into law in may 1862, the homestead act opened up settlement in the western united states, allowing any american, including freed slaves, to put in a claim for up to 160 free acres of federal land. by the end of the civil war, 15,000 homestead claims had been established, and more followed in the postwar years

the government closely monitored its finances to avoid another financial collapse.