What is an ecosystem and why would we study energy flow in relation to the ecosystem?

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.

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution

Apart of an ecosystem that can restrict the growth of a population is referred to as