Describe the ovary of the flower

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.

The following hormone had their receptors in the cell membrane except a-insulin b-tsh c-gh d- cortisol

What was the land like over 500 million years ago? what was under the sea?