Naturally occurring events cause rocks to break down and be deposited down-slope, sometimes as far away as the ocean. given this circumstance, is right or wrong for a government to mandate laws that reduce silt from waterways and require farmers to reduce soil erosion? why?

It is wrong because by reducing silt from waterways, you may be taking away a food source from a fish that has adapted to meet that certain environment. It also serves as a good mating ground, because they can hide their eggs. Farmers should not have to reduce soil erosion because the nutrients from the decaying soil will help the new plants or soil. They will absorb the dying soil's nutrients. It help the new plant grow.

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!

characteristics of hydrocarbons