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.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

the endomembrane system i think