15. Houston houses some of the largest petrochemical plants in the United States. These factories are often found near residential neighborhoods. One survey found that factories are more likely to be located near poorer neighborhoods because it's less complicated to obtain permits to locate there, and there's generally less public resistance. How does this practice go against the goals and purpose of environmental policy? O A. It treats people unequally under the law, according to income, which is unjust. B. It goes against the law of social responsibility C. It goes against polluters' rights to place their factories wherever they like. O D. It goes against the principle that factories should be located where they cause the least damage.​

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!