It has been said above that Bismuth has a simple cubic unit cell. <span> In this case one atom or ion lies at each corner of the cube. Since only 1/8 of each corner sphere lies within the unit cell hence simple cubic unit cell will only have one atom. Hope this answers the question.</span>
If the species is becoming resistant to the weed killer, natural selection will cause future generations to become resistant as well, therefore the percentage of resistant dollar weed will increase. Also I took the test lol.