What is a biogeochemical cycle?a process that recycles elements and other matter through the biosphere

Why are adults bigger than they were as children biology

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.

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?