2points
currents are caused by temperature and density differences,

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.

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated