Social contract as defined by western in the 18 century

What kind of seafood would you expect to have the highest levels of mercury and why? kelp, because they use the sun to photosynthesize on the bottom trophic level. oysters, because they filter feed on plankton on a lower trophic level. small fish, because they eat plankton on a higher trophic level. sharks, because they feed on organisms on a higher trophic level.

Compare the composition of the moon's surface with the composition of the earth's surface.

What was darwins theory of common decent